diff --git a/app/controllers/admin/journal_papers_controller.rb b/app/controllers/admin/journal_papers_controller.rb
index a4cd576..92daf07 100644
--- a/app/controllers/admin/journal_papers_controller.rb
+++ b/app/controllers/admin/journal_papers_controller.rb
@@ -13,7 +13,7 @@ class Admin::JournalPapersController < OrbitMemberController
     @journals=JournalPaper.order_by(:year=>'desc').map{|value| value}.group_by{|v| [v[:paper_title],v[:journal_title]]}
     @journals.each do |key,value|
       if value.length==1
-        @journals.except! key
+        @journals.delete key
       end
     end
     #journals = JournalPaper.order_by(:year=>'desc').map{|value| value}
@@ -32,10 +32,10 @@ class Admin::JournalPapersController < OrbitMemberController
     #end
     if params['mode']!='simple'
       @journals.each do |key,value|
-        value = value.group_by{|v| [get_level_type(v),get_author_type(v),get_paper_type(v),get_publication_date(v)]}
-        value.each do |key1,value1|
+        @journals[key] = value.group_by{|v| [get_level_type(v),get_author_type(v),get_paper_type(v),get_publication_date(v)]}
+        @journals[key].each do |key1,value1|
           if value1.length==1
-            value.except! key1
+            value.delete key1
           end
         end
       end