diff --git a/.gitattributes b/.gitattributes
index 4482262..251917a 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,2 +1,3 @@
+src/replacements/*/*.md -text
 src/replacements/*/*.json -text
 src/replacements/*/*.html -text
diff --git a/src/replacements/gcn-circular/index.ts b/src/replacements/gcn-circular/index.ts
index 07d8a5e..c723454 100644
--- a/src/replacements/gcn-circular/index.ts
+++ b/src/replacements/gcn-circular/index.ts
@@ -5,8 +5,8 @@ function normalize(match: string) {
   return parseFloat(match.replace(/a$/i, '.5'))
 }
 
-const preamble = /GCN(?:s|\s+Circulars?|\s+Circs?\.)?\s*/.source
-const conjunction = /(?:\s*|,|and)+/.source
+const preamble = /GCN(?:s|\s+Circulars?|\s+Circs?\.?)?\s*(?:#)?/gi.source
+const conjunction = /(?:\s*#?|,|and\s*#?)+/.source
 const circularIdRegExp = /\d+(?:a|\.5)?/gi
 const circularId = circularIdRegExp.source
 const legacyUrlOrigin = /https?:\/\/gcn\.gsfc\.nasa\.gov/.source
@@ -17,7 +17,7 @@ const url = `${urlOrigin}/circulars/(${circularId})`
 
 export default {
   find: new RegExp(
-    `${url}|${legacyUrl}|(?<=^|\\s)(?:${preamble}${circularId}(?:${conjunction}${circularId})*)`,
+    `${url}|${legacyUrl}|(?<=^|\\s|\\()(?:${preamble}${circularId}(?:${conjunction}${circularId})*)`,
     'gi'
   ),
   replace(data, value, circularIdFromUrl, circularIdFromLegacyUrl) {
diff --git a/src/replacements/gcn-circular/test.html b/src/replacements/gcn-circular/test.html
index 8db6ac7..41a4696 100644
--- a/src/replacements/gcn-circular/test.html
+++ b/src/replacements/gcn-circular/test.html
@@ -5,4 +5,46 @@ <h1>Hello, world</h1>
 <p>And even really weird legacy URLs work: <data class="gcn-circular" value="33567">https://gcn.gsfc.nasa.gov/gcn/gcn/gcn/gcn3/33567.gcn3</data></p>
 <p>GCN Circ. <data class="gcn-circular" value="789">789</data> and GCN Circs. <data class="gcn-circular" value="3">3</data> and <data class="gcn-circular" value="4">4</data></p>
 <p>And this one refers to GCNs <data class="gcn-circular" value="1">1</data>, <data class="gcn-circular" value="23.5">23a</data>, <data class="gcn-circular" value="45.5">45.5</data> and <data class="gcn-circular" value="42">42</data></p>
-<p>This is not a Circular: http://gcn.gsfc.nasa.gov/gcn/other/971227.gcn3</p>
\ No newline at end of file
+<p>This is not a Circular: http://gcn.gsfc.nasa.gov/gcn/other/971227.gcn3</p>
+<p>All of these minor variations with parentheses, octothorpes, character casing, and periods, and different conjunctions are also supported:
+GCN <data class="gcn-circular" value="123">123</data>
+GCN #<data class="gcn-circular" value="123">123</data>
+(GCN <data class="gcn-circular" value="123">123</data>)
+(GCN #<data class="gcn-circular" value="123">123</data>)
+GCN circ. <data class="gcn-circular" value="123">123</data>
+GCN circ. #<data class="gcn-circular" value="123">123</data>
+(GCN circ. #<data class="gcn-circular" value="123">123</data>)
+GCN circ <data class="gcn-circular" value="123">123</data>
+(GCN circ <data class="gcn-circular" value="123">123</data>)
+GCN Circ. <data class="gcn-circular" value="123">123</data>
+GCN Circ. #<data class="gcn-circular" value="123">123</data>
+(GCN Circ. #<data class="gcn-circular" value="123">123</data>)
+GCN Circ <data class="gcn-circular" value="123">123</data>
+(GCN Circ <data class="gcn-circular" value="123">123</data>)
+GCN Circular <data class="gcn-circular" value="123">123</data>
+GCN Circular #<data class="gcn-circular" value="123">123</data>
+(GCN Circular <data class="gcn-circular" value="123">123</data>)
+(GCN Circular #<data class="gcn-circular" value="123">123</data>)
+GCN Circs <data class="gcn-circular" value="123">123</data>, <data class="gcn-circular" value="456">456</data>
+GCN Circs. <data class="gcn-circular" value="123">123</data>, <data class="gcn-circular" value="456">456</data>
+GCN Circs #<data class="gcn-circular" value="123">123</data>, #<data class="gcn-circular" value="456">456</data>
+(GCN Circs #<data class="gcn-circular" value="123">123</data>, #<data class="gcn-circular" value="456">456</data>)
+(GCN Circs <data class="gcn-circular" value="123">123</data>, <data class="gcn-circular" value="456">456</data>)
+GCN Circ <data class="gcn-circular" value="123">123</data>, <data class="gcn-circular" value="456">456</data>
+GCN Circ. <data class="gcn-circular" value="123">123</data>, <data class="gcn-circular" value="456">456</data>
+GCN Circ #<data class="gcn-circular" value="123">123</data>, #<data class="gcn-circular" value="456">456</data>
+(GCN Circ <data class="gcn-circular" value="123">123</data>, <data class="gcn-circular" value="456">456</data>)
+GCN circs <data class="gcn-circular" value="123">123</data>, <data class="gcn-circular" value="456">456</data>
+GCN circs. <data class="gcn-circular" value="123">123</data>, <data class="gcn-circular" value="456">456</data>
+GCN circs #<data class="gcn-circular" value="123">123</data>, #<data class="gcn-circular" value="456">456</data>
+(GCN circs <data class="gcn-circular" value="123">123</data>, <data class="gcn-circular" value="456">456</data>)
+GCN circs <data class="gcn-circular" value="123">123</data> and <data class="gcn-circular" value="456">456</data>
+GCN circs. <data class="gcn-circular" value="123">123</data> and <data class="gcn-circular" value="456">456</data>
+GCN circs #<data class="gcn-circular" value="123">123</data> and #<data class="gcn-circular" value="456">456</data>
+(GCN circs <data class="gcn-circular" value="123">123</data> and <data class="gcn-circular" value="456">456</data>)
+GCN circs <data class="gcn-circular" value="123">123</data> <data class="gcn-circular" value="456">456</data>
+GCN circs. <data class="gcn-circular" value="123">123</data> <data class="gcn-circular" value="456">456</data>
+GCN circs #<data class="gcn-circular" value="123">123</data> #<data class="gcn-circular" value="456">456</data>
+(GCN circs <data class="gcn-circular" value="123">123</data> <data class="gcn-circular" value="456">456</data>)
+GCN #<data class="gcn-circular" value="123">123</data>
+gcn <data class="gcn-circular" value="123">123</data></p>
\ No newline at end of file
diff --git a/src/replacements/gcn-circular/test.json b/src/replacements/gcn-circular/test.json
index 0e03023..ec6d2d0 100644
--- a/src/replacements/gcn-circular/test.json
+++ b/src/replacements/gcn-circular/test.json
@@ -209,6 +209,919 @@
           "value": "This is not a Circular: http://gcn.gsfc.nasa.gov/gcn/other/971227.gcn3"
         }
       ]
+    },
+    {
+      "type": "paragraph",
+      "children": [
+        {
+          "type": "text",
+          "value": "All of these minor variations with parentheses, octothorpes, character casing, and periods, and different conjunctions are also supported:\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circ. "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circ. #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN circ. #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circ "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN circ "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circ. "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circ. #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN Circ. #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circ "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN Circ "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circular "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circular #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN Circular "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN Circular #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circs "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circs. "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circs #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", #"
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN Circs #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", #"
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN Circs "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circ "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circ. "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN Circ #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", #"
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN Circ "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circs "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circs. "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circs #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", #"
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN circs "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": ", "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circs "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": " and "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circs. "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": " and "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circs #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": " and #"
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN circs "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": " and "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circs "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": " "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circs. "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": " "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN circs #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": " #"
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n("
+        },
+        {
+          "type": "text",
+          "value": "GCN circs "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": " "
+        },
+        {
+          "type": "text",
+          "value": "456",
+          "data": {
+            "class": "gcn-circular",
+            "value": 456
+          }
+        },
+        {
+          "type": "text",
+          "value": ")\n"
+        },
+        {
+          "type": "text",
+          "value": "GCN #"
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        },
+        {
+          "type": "text",
+          "value": "\n"
+        },
+        {
+          "type": "text",
+          "value": "gcn "
+        },
+        {
+          "type": "text",
+          "value": "123",
+          "data": {
+            "class": "gcn-circular",
+            "value": 123
+          }
+        }
+      ]
     }
   ]
 }
\ No newline at end of file
diff --git a/src/replacements/gcn-circular/test.md b/src/replacements/gcn-circular/test.md
index 1337cd8..5050fe7 100644
--- a/src/replacements/gcn-circular/test.md
+++ b/src/replacements/gcn-circular/test.md
@@ -13,3 +13,46 @@ GCN Circ. 789 and GCN Circs. 3 and 4
 And this one refers to GCNs 1, 23a, 45.5 and 42
 
 This is not a Circular: http://gcn.gsfc.nasa.gov/gcn/other/971227.gcn3
+
+All of these minor variations with parentheses, octothorpes, character casing, and periods, and different conjunctions are also supported:
+GCN 123
+GCN #123
+(GCN 123)
+(GCN #123)
+GCN circ. 123
+GCN circ. #123
+(GCN circ. #123)
+GCN circ 123
+(GCN circ 123)
+GCN Circ. 123
+GCN Circ. #123
+(GCN Circ. #123)
+GCN Circ 123
+(GCN Circ 123)
+GCN Circular 123
+GCN Circular #123
+(GCN Circular 123)
+(GCN Circular #123)
+GCN Circs 123, 456
+GCN Circs. 123, 456
+GCN Circs #123, #456
+(GCN Circs #123, #456)
+(GCN Circs 123, 456)
+GCN Circ 123, 456
+GCN Circ. 123, 456
+GCN Circ #123, #456
+(GCN Circ 123, 456)
+GCN circs 123, 456
+GCN circs. 123, 456
+GCN circs #123, #456
+(GCN circs 123, 456)
+GCN circs 123 and 456
+GCN circs. 123 and 456
+GCN circs #123 and #456
+(GCN circs 123 and 456)
+GCN circs 123 456
+GCN circs. 123 456
+GCN circs #123 #456
+(GCN circs 123 456)
+GCN #123
+gcn 123