The book is a little bit out of date ...

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@420862 13f79535-47bb-0310-9956-ffa450edef68

docs/contributors.html

@@ -241,10 +241,7 @@ the Ant build tool.  He is also serving as the Chairman of this PMC.
 				<b>Jan Matèrne</b> (jhm at apache.org)
 <br />
 Jan is consultant for OOA/D in the computer centre of the government
-of Northrhine Westfalia / Germany. He is the co-author of
-<a href="http://www.galileocomputing.de/katalog/buecher/titel/gp/titelID-341?">
-Rational Rose und UML im Praxiseinsatz</a> the first German book about
-that OOAD-tool.
+of Northrhine Westfalia / Germany.
             </p>
                                 <p>
                 <b>Peter Reilly</b><br />

xdocs/contributors.xml

@@ -99,10 +99,7 @@ the Ant build tool.  He is also serving as the Chairman of this PMC.
 				<b>Jan Matèrne</b> (jhm at apache.org)
 <br/>
 Jan is consultant for OOA/D in the computer centre of the government
-of Northrhine Westfalia / Germany. He is the co-author of
-<a href="http://www.galileocomputing.de/katalog/buecher/titel/gp/titelID-341?">
-Rational Rose und UML im Praxiseinsatz</a> the first German book about
-that OOAD-tool.
+of Northrhine Westfalia / Germany.
             </p>
 
             <p>