diff --git a/feature_model_diagrams.htm b/feature_model_diagrams.htm
index 894b716..fd19c9b 100644
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+++ b/feature_model_diagrams.htm
@@ -94,9 +94,9 @@ assuming no constraints.</p>
 </blockquote>
 <h2>References</h2>
 <p>Krzysztof Czarnecki and Ulrich W. Eisenecker, <a name="Generative Programming" href="http://www.generative-programming.org">Generative
-Programming</a>, Addison-Wesley, 2000, ISBN 0-210-30977-7</p>
+Programming</a>, Addison-Wesley, 2000, ISBN 0-201-30977-7</p>
 <hr>
-<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B %Y" startspan -->02 October 2003<!--webbot bot="Timestamp" endspan i-checksum="32277" --></p>
+<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B %Y" startspan -->26 August 2004<!--webbot bot="Timestamp" endspan i-checksum="32277" --></p>
 <p>© Copyright Beman Dawes, 2000</p>
 
 <p> Use, modification, and distribution are subject to the Boost Software 
@@ -106,4 +106,4 @@ www.boost.org/LICENSE_1_0.txt</a>)</p>
 
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