diff --git a/gpl-lgpl.tex b/gpl-lgpl.tex
index 9a62475..c545368 100644
--- a/gpl-lgpl.tex
+++ b/gpl-lgpl.tex
@@ -576,7 +576,9 @@ to fuel a commercial system around that software.
 For example, consider the Samba file server system that allows Unix-like
 systems (including GNU/Linux) to serve files to Microsoft Windows systems.
 Two graduate students originally developed Samba in their spare time and
-it was deployed noncommercially in academic environments. However, very
+it was deployed noncommercially in academic environments\footnote{See
+  \href{http://turtle.ee.ncku.edu.tw/docs/samba/history}{Andrew Tridgell's
+    ``A bit of history and a bit of fun''}.  However, very
 soon for-profit companies discovered that the software could work for them
 as well, and their system administrators began to use it in place of
 Microsoft Windows NT file-servers. This served to lower the cost of