diff --git a/_sources/variables.rst.txt b/_sources/variables.rst.txt
index d2d1139..b73b82f 100644
--- a/_sources/variables.rst.txt
+++ b/_sources/variables.rst.txt
@@ -21,8 +21,12 @@ values within the statistics page are aggregated across entire cities. Unless
 explicitly described otherwise, values of all variables are weighted by
 population density. This means that, for example, distances to nearest schools
 represent average distances that each person must travel to get to school. Full
-descriptions of the calculation of all variables are given in the :ref:`*Software
-and Algorithms* chapter<Software and Algorithms>`.
+descriptions of the calculation of all variables are given in the |sw-chapter|.
+
+.. |sw-chapter| raw:: html
+
+   <a href="https://docs.urbananalyst.city/software.html">
+   <em>Software and Algorithms</em> chapter</a>
 
 Socio-demographic variables
 ***************************
diff --git a/variables.html b/variables.html
index 24690e4..a4c2c74 100644
--- a/variables.html
+++ b/variables.html
@@ -114,8 +114,8 @@ <h1><span class="section-number">4. </span>UA Variables<a class="headerlink" hre
 explicitly described otherwise, values of all variables are weighted by
 population density. This means that, for example, distances to nearest schools
 represent average distances that each person must travel to get to school. Full
-descriptions of the calculation of all variables are given in the <a class="reference internal" href="software.html#software-and-algorithms"><span class="std std-ref">*Software
-and Algorithms* chapter</span></a>.</p>
+descriptions of the calculation of all variables are given in the <a href="https://docs.urbananalyst.city/software.html">
+<em>Software and Algorithms</em> chapter</a>.</p>
 <section id="socio-demographic-variables">
 <h2><span class="section-number">4.1. </span>Socio-demographic variables<a class="headerlink" href="#socio-demographic-variables" title="Link to this heading"></a></h2>
 <p>The extent and structure of each city is defined by its “socio-demographic