diff --git a/app/assets/stylesheets/objects/_search-result.scss b/app/assets/stylesheets/objects/_search-result.scss
index ff97374..715958d 100644
--- a/app/assets/stylesheets/objects/_search-result.scss
+++ b/app/assets/stylesheets/objects/_search-result.scss
@@ -12,6 +12,6 @@
   margin-bottom: 0.1rem;
 }
 
-.search-result .metainfo {
-  font-size: 0.8rem;
+.search-result .current {
+  font-weight: $font-weight-bold;
 }
diff --git a/app/controllers/search_controller.rb b/app/controllers/search_controller.rb
index fefbf16..8653b7c 100644
--- a/app/controllers/search_controller.rb
+++ b/app/controllers/search_controller.rb
@@ -24,6 +24,24 @@ class SearchController < ApplicationController
   def execute_search
     @response = Paper.search(@search_definition.to_definition)
     @papers = @response.page(params[:page]).results
+    @sub = Hash.new
+    @papers.each do |paper|
+      @sub_search_definition = Elasticsearch::DSL::Search.search do
+        query do
+          query_string do
+        	query "*" + (paper.reference.start_with?("VI-") ? paper.reference.split("-")[2] : paper.reference.split("-")[1]) + "*"
+        	fields ["reference"]
+          end
+        end
+
+        sort do
+          by :published_at, order: 'asc'
+          by :reference, order: 'asc'
+        end 
+      end
+      @sub_papers = Paper.search(@sub_search_definition)
+      @sub[paper.reference] = @sub_papers
+    end  
     @paper_type_facets = extract_facets('paper_types')
     @originator_facets = extract_facets('originators')
   end
diff --git a/app/models/paper.rb b/app/models/paper.rb
index 77ab1d3..e36b744 100644
--- a/app/models/paper.rb
+++ b/app/models/paper.rb
@@ -26,6 +26,7 @@ class Paper < ActiveRecord::Base
       indexes :name, type: :string, analyzer: "german"
       indexes :content, type: :string, analyzer: "german"
       indexes :resolution, type: :string, analyzer: "german"
+      indexes :reference, type: :string, index: :not_analyzed
       indexes :paper_type, type: :string, index: :not_analyzed
       indexes :published_at, type: :date, index: :not_analyzed
       indexes :originator, type: :string, index: :not_analyzed
diff --git a/app/views/search/index.html.slim b/app/views/search/index.html.slim
index 42bb61d..ac1d78d 100644
--- a/app/views/search/index.html.slim
+++ b/app/views/search/index.html.slim
@@ -5,8 +5,6 @@ div
   - if params[:q].present?
     .left
       | #{@papers.total} Treffer
-    .right
-      / button.button. TODO: Suche Abbonieren
   - else
     | #{pluralize(@papers.total, "Dokument", "Dokumente")} in der Datenbank
 div
@@ -14,14 +12,12 @@ div
     - @papers.each do |doc|
       li.search-result
         article
-          h4 = link_to doc.name, doc.url, target: '_blank'
-          div.metainfo
-            span.paper_type = doc.paper_type
-            '
-            span.originator = doc.originator
-            '
-            span.published = l doc.published_at.to_date
-            /! score: #{doc._score}
+          h4 = doc.name
+          ul
+            - @sub[doc.reference].each do |sub|
+              li class="#{'current' if sub.reference == doc.reference}"
+                div = link_to "#{l sub.published_at.to_date}: #{sub.paper_type} von #{sub.originator.join(", ")}", sub.url, target: '_blank'
+              
 
 div#pagination
   = paginate @papers