diff -r a430e494cb19 -r c65b5d508a17 Nominal/main.html
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+++ b/Nominal/main.html	Wed Mar 30 17:15:27 2016 +0100
@@ -187,7 +187,7 @@
     <TD ALIGN=Left>
     <B>Nominal Reasoning Techniques in Isabelle/HOL.</B>  In
       Journal of Automatic Reasoning, Vol. 40(4), 327-356, 2008.
-      [<A HREF="http://www.inf.kcl.ac.uk/staff/urbanc/Publications/nom-tech.ps" target="_top">ps</A>].
+      [<A HREF="http://www.inf.kcl.ac.uk/staff/urbanc/Publications/nom-tech.pdf" target="_top">pdf</A>].
       The predecessor paper, which appeaerd at CADE in 2005, received the
       <A HREF="http://www.cadeinc.org/SkolemAward.html">Thoralf Skolem Award</A>.
     </TD>