--- a/chm.rst	Sat Sep 19 13:38:09 2015 +0300
+++ b/chm.rst	Sat Sep 19 13:39:13 2015 +0300
@@ -24,9 +24,12 @@
 =============
 
   http://www.imendio.com/projects/devhelp/
-    DevHelp is a GNOME based online help system aimed toward developers
+    DevHelp is a GNOME based online help system aimed toward developers.
   http://en.wikipedia.org/wiki/MHTML
-    MHTML, short for MIME HTML
+    MHTML, short for MIME HTML.
+
+ * https://en.wikipedia.org/wiki/Online_help
+ * https://en.wikipedia.org/wiki/List_of_help_authoring_tools
 
 Microsoft HTML Help.
 ====================