diff -r 3843a200dad6 -r eb84ca2b6317 client/app/books/books.html
--- a/client/app/books/books.html	Thu Jun 11 12:19:39 2015 +0200
+++ b/client/app/books/books.html	Thu Jun 11 12:35:10 2015 +0200
@@ -1,7 +1,7 @@
 
 
 <accordion close-others="false">
-    <accordion-group ng-repeat="book in books | filter:{ parent_visit: '!null', id_article: 'null' }" is-open=true>
+    <accordion-group ng-repeat="book in books | filter:{ id_article: 'null' }" is-open=true>
 
         <accordion-heading>