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 <B>Nominal Isabelle</B> 
 I currently work on Nominal 
 <A HREF="http://isabelle.in.tum.de">Isabelle</A> 2. This is joint work with 
-<A HREF="http://wwwbroy.in.tum.de/~berghofe/">Dr Stefan Berghofer</A>,
+<A HREF="http://www21.in.tum.de/~berghofe/">Dr Stefan Berghofer</A>,
 <A HREF="http://sketis.net/">Dr Markus Wenzel</A>,
 <A HREF="http://cl-informatik.uibk.ac.at/users/cek/">Dr Cezary Kaliszyk</A>,
 <A HREF="http://user.it.uu.se/~tjawe125/">Dr Tjark Weber</A> and