From 690007ff012939bf0a6c87120068c1587f74b341 Mon Sep 17 00:00:00 2001
From: see24 <sarahendicott4@gmail.com>
Date: Fri, 17 Jun 2022 16:42:53 -0400
Subject: [PATCH] add refs to description

---
 DESCRIPTION | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/DESCRIPTION b/DESCRIPTION
index 8d46013..a49d427 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -28,9 +28,11 @@ URL: https://github.com/LandSciTech/roads,
      https://landscitech.github.io/roads/
 Description: Project road network development based on an existing road 
     network, target locations to be connected by roads and a cost surface. Road 
-    projection methods include minimum spanning tree with least cost path, least
-    cost path or snapping. These road network projection methods are ideal for
-    use with land cover change projection models.
+    projection methods include minimum spanning tree with least cost path 
+    (Kruskal’s algorithm (1956) <doi:10.2307/2033241>), least cost path 
+    (Dijkstra's algorithm (1959) <doi:10.1007/BF01386390>) or snapping. 
+    These road network projection methods are ideal for use with land cover
+    change projection models.
 License: Apache License (>= 2)
 Encoding: UTF-8
 LazyData: true