--- a/index.html	Thu Sep 26 12:29:25 2013 +0100
+++ b/index.html	Fri Sep 27 14:27:21 2013 +0100
@@ -134,7 +134,7 @@
 <P>
 
 <B>Conferences</B>
-<A HREF="http://www.iiia.csic.es/~levy/unif06/">UNIF'06</A> (member of PC), 
+UNIF'06 (member of PC), 
 <A HREF="http://www.cs.mcgill.ca/~bpientka/lfmtp07">LFMTP'07</A> (member of PC), 
 <A HREF="http://isabelle.in.tum.de/nominal/activities/lfmtp08/">LFMTP'08</A> (PC co-chair), 
 <A HREF="http://www.cis.upenn.edu/~sweirich/wmm/">WMM'08</A> (member of PC),
@@ -149,7 +149,7 @@
 <A HREF="http://www.inf.kcl.ac.uk/staff/maribel/UNIF/UNIF.html">UNIF'10</A> (invited speaker),
 <A HREF="http://www.cis.upenn.edu/~bcpierce/wmm/">WMM'10</A> (invited speaker),
 <A HREF="http://isabelle.in.tum.de/nominal/activities/idw10/idw.html">IDW'10</A> (co-organiser),
-<A HREF="http://formes.asia/cpp">CPP'11</A> (member of PC),
+CPP'11 (member of PC),
 <A HREF="http://www.rdp2011.uns.ac.rs/rta/">RTA'11</A> (member of PC),
 <A HREF="http://lfmtp11.cs.umn.edu">LFMTP'11</A> (member of PC),
 <A HREF="http://www.cs.uwyo.edu/~ruben/itp-2014">ITP'14</A> (member of PC)
@@ -167,7 +167,7 @@
 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="https://www.lri.fr/~wenzel/">Dr Markus Wenzel</A>,
+<A HREF="http://www.lri.fr/~wenzel/">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 
 the Isabelle-team in Munich.
@@ -204,7 +204,7 @@
 <A HREF="https://lists.cam.ac.uk/pipermail/cl-isabelle-users/2005-September/msg00012.html">pain</A> 
 in theorem provers, especially in those that are based on HOL. 
 We therefore went against the 
-<A HREF="http://books.google.com/books?id=8lKyxS8_CNoC&amp;pg=PA14&amp;source=gbs_toc_r&amp;cad=4#v=onepage&amp;q&amp;f=false">mainstream</A> 
+<A HREF="http://www.cs.cornell.edu/~kozen/papers/papers_by_year.htm#K97a">mainstream</A> 
 and used in our formalisation regular expressions exclusively,
 because they are much more convenient for formal reasoning. The results we
 formalised include: the Myhill-Nerode theorem, the closure of regular languages
@@ -295,7 +295,7 @@
 
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