diff -r 8005c92a85d7 -r 67bfcd3a433c src/HOL/Isar_examples/document/root.bib
--- a/src/HOL/Isar_examples/document/root.bib	Fri Oct 29 19:00:51 1999 +0200
+++ b/src/HOL/Isar_examples/document/root.bib	Fri Oct 29 19:24:20 1999 +0200
@@ -43,7 +43,7 @@
   institution =  CUCL,
   year = 	 1996,
   number =	 394,
-  note = {\url{http://www.ftp.cl.cam.ac.uk/ftp/papers/reports/TR394-lcp-mutilated-chess-board.pdf}}
+  note = {\url{http://www.ftp.cl.cam.ac.uk/ftp/papers/reports/}}
 }
 
 @Proceedings{tphols99,