diff --git a/app/controllers/personal_conferences_controller.rb b/app/controllers/personal_conferences_controller.rb
index e6569ad..769f429 100644
--- a/app/controllers/personal_conferences_controller.rb
+++ b/app/controllers/personal_conferences_controller.rb
@@ -33,7 +33,7 @@ class PersonalConferencesController < ApplicationController
       when "paper_levels"
           writing_conferences_show = writing_conferences_temp.select {|value| value.conference_paper_levels.collect{|x| x.title}.join(', ').to_s.include? params[:keywords]}
       when "paper_types"
-          writing_conferences_show = writing_conferences_temp.select {|value| value.conference_paper_levels.collect{|x| x.title}.join(', ').to_s.include? params[:keywords]}
+          writing_conferences_show = writing_conferences_temp.select {|value| value.conference_paper_types.collect{|x| x.title}.join(', ').to_s.include? params[:keywords]}
       when "period"
           writing_conferences_show = writing_conferences_temp.select {|value| value.duration.include? params[:keywords]}
       when "publication_date"
@@ -68,7 +68,7 @@ class PersonalConferencesController < ApplicationController
         when "paper_levels"
           t << {"value" => ( !writing_conference.conference_paper_levels.blank? ? "(#{writing_conference.conference_paper_levels.collect{|x| x.title}.join(', ')})" : nil)} 
         when "paper_types"
-          t << {"value" => ( !writing_conference.conference_paper_levels.blank? ? "(#{writing_conference.conference_paper_levels.collect{|x| x.title}.join(', ')})" : nil)} 
+          t << {"value" => ( !writing_conference.conference_paper_types.blank? ? "(#{writing_conference.conference_paper_types.collect{|x| x.title}.join(', ')})" : nil)} 
         when "publication_date"
           t << {"value" => (writing_conference.send(fs).strftime("%Y/%m") rescue "")}
         when "author_type"