diff --git a/reference/strings/functions/substr.xml b/reference/strings/functions/substr.xml
index 8ae115ea4c..1534b970e9 100644
--- a/reference/strings/functions/substr.xml
+++ b/reference/strings/functions/substr.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.6 $ -->
+<!-- $Revision: 1.7 $ -->
 <!-- splitted from ./en/functions/strings.xml, last change in rev 1.2 -->
   <refentry id="function.substr">
    <refnamediv>
@@ -93,8 +93,10 @@ $rest = substr("abcdef", -3, -1); // returns "de"
      </programlisting>
     </example>
     <para>
-     See also <function>strrchr</function> and
-     <function>ereg</function>.
+     See also <function>strrchr</function>,
+     <function>substr_replace</function>,
+     <function>ereg</function>, and 
+     <function>trim</function>.
     </para>
    </refsect1>
   </refentry>