--- a/doc-src/TutorialI/Overview/LNCS/document/root.bib	Wed Jul 31 16:10:24 2002 +0200
+++ b/doc-src/TutorialI/Overview/LNCS/document/root.bib	Wed Jul 31 17:42:38 2002 +0200
@@ -3,4 +3,5 @@
 
 @book{LNCS2283,author={Tobias Nipkow and Lawrence Paulson and Markus Wenzel},
 title="Isabelle/HOL --- A Proof Assistant for Higher-Order Logic",
-publisher=Springer,series=LNCS,volume=2283,year=2002}
+publisher=Springer,series=LNCS,volume=2283,year=2002,
+note={\url{http://www.in.tum.de/~nipkow/LNCS2283/}}}