diff -r dd8b5f835522 -r 97b98e7a6eee plugins/redmine_bibliography/assets/stylesheets/bibliography.css
--- a/plugins/redmine_bibliography/assets/stylesheets/bibliography.css
+++ b/plugins/redmine_bibliography/assets/stylesheets/bibliography.css
@@ -64,10 +64,10 @@
 
 input.author_search {width:100%}
 input.author_search {
-  background: url(../images/magnifier.png) no-repeat 2px 50%; padding-left:20px;
+  background: url(../../../images/magnifier.png) no-repeat 2px 50%; padding-left:20px;
   border:1px solid #9EB1C2; border-radius:3px; height:1.5em; width:95%;
 }
 input.author_search.ajax-loading {
-  background-image: url(../images/loading.gif);
+  background-image: url(../../../images/loading.gif);
 }