diff --git a/user-doc/bibliography.bib b/user-doc/bibliography.bib
index e4ca5b0eba03377dd2365275d966d82802380e02..55b6aea87afb78e74aa716b7bad7f7b20341db1a 100644
--- a/user-doc/bibliography.bib
+++ b/user-doc/bibliography.bib
@@ -2698,7 +2698,6 @@ pages = {3999--4000},
 	Pages = {773--781},
 	Publisher = {Curran Associates, Inc., Red Hook, NY},
 	Title = {Non-strongly-convex smooth stochastic approximation with convergence rate O(1/n)},
-        Url = {http://papers.nips.cc/paper/4900-non-strongly-convex-smooth-stochastic-approximation-with-convergence-rate-o1n.pdf}
 	Year = {2013}
 }