diff --git a/config/services.yaml b/config/services.yaml
index 38faa4b6579bfb8d6b50f6e8b6d0a9e5b33be071..f296198aa665876704a974e2688f6432f0680c42 100755
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -103,3 +103,9 @@ services:
               arguments:
                   - '%tei_dir%'
                   - '%tei_sample_dir%'
+
+    App\Import\MetadataTransformer:
+        calls:
+            - method: 'setConfigs'
+              arguments:
+                  - '%env(MAIN_DOMAIN)%'
diff --git a/src/Controller/ItemController.php b/src/Controller/ItemController.php
index 6812a2cf6cdd01d12956da94edd5a23312af4387..ee021b8e2474ac7b5560861ae6368e6d45b7109b 100755
--- a/src/Controller/ItemController.php
+++ b/src/Controller/ItemController.php
@@ -19,7 +19,7 @@ class ItemController extends AbstractController
     }
 
     /**
-     * @Route("/id/{id}")
+     * @Route("/id/{id}", name="_detail")
      */
     public function detail(string $id, Request $request): Response
     {
diff --git a/src/Import/Indexer.php b/src/Import/Indexer.php
index 9288f5f932e8433b2c2088fea11017bbd899b925..ce420acd1a2f94ecc4a5bf07e59dd83fb30662d5 100644
--- a/src/Import/Indexer.php
+++ b/src/Import/Indexer.php
@@ -429,7 +429,7 @@ class Indexer implements IndexerInterface
                 $doc->response = $response;
             }
 
-            if (isset($relatedItem) && !empty($relatedItem)) {
+            if (isset($relatedItems) && !empty($relatedItems)) {
                 $doc->related_items = $relatedItems;
             }
 
diff --git a/src/Import/MetadataTransformer.php b/src/Import/MetadataTransformer.php
index fa733304beafe9e62b98e4627af4c003f5945624..00cfa88b3aa505268c048739ac06c4e528e0238f 100644
--- a/src/Import/MetadataTransformer.php
+++ b/src/Import/MetadataTransformer.php
@@ -5,9 +5,23 @@ declare(strict_types=1);
 namespace App\Import;
 
 use DOMXPath;
+use Symfony\Component\Routing\RouterInterface;
 
 class MetadataTransformer implements MetadataTransformerInterface
 {
+    private RouterInterface $router;
+    private ?string $mainDomain;
+
+    public function __construct(RouterInterface $router)
+    {
+        $this->router = $router;
+    }
+
+    public function setConfigs(string $mainDomain): void
+    {
+        $this->mainDomain = $mainDomain;
+    }
+
     public function getAuthor(DOMXPath $xpath): string
     {
         $author = '';
@@ -325,8 +339,21 @@ class MetadataTransformer implements MetadataTransformerInterface
         $reference = '';
         $referenceNode = $xpath->query('//tei:relatedItem[@type = "letter" and @subtype = "related"]/tei:ref');
         if ($referenceNode->item(0)) {
-            $reference = $referenceNode->item(0)->nodeValue;
-            $reference = trim(preg_replace('/\s+/', ' ', $reference));
+            $referenceText = $referenceNode->item(0)->nodeValue;
+            $referenceText = trim(preg_replace('/\s+/', ' ', $referenceText));
+            $refLink = $referenceNode->item(0)->attributes->item(0)->textContent;
+            $documentId = array_reverse(explode('/', $refLink))[0];
+
+            if (str_contains($documentId, '.')) {
+                $documentId = explode('.', $documentId)[0];
+                $documentUrl = $this->mainDomain.$this->router->generate('_detail', ['id' => $documentId]);
+            }
+
+            if (!empty($referenceText) && !empty($documentUrl)) {
+                $reference = $referenceText.' ('.$documentUrl.')';
+            } elseif (!empty($referenceText)) {
+                $reference = $referenceText;
+            }
         }
 
         return $reference;
@@ -339,7 +366,21 @@ class MetadataTransformer implements MetadataTransformerInterface
         if (is_iterable($relatedItemNodes)) {
             foreach ($relatedItemNodes as $relatedItemNode) {
                 if (!empty($relatedItemNode->nodeValue)) {
-                    $relatedItem = trim(preg_replace('/\s+/', ' ', $relatedItemNode->nodeValue));
+                    $relatedItemText = trim(preg_replace('/\s+/', ' ', $relatedItemNode->nodeValue));
+                    $refLink = $relatedItemNode->attributes->item(0)->textContent;
+                    $documentId = array_reverse(explode('/', $refLink))[0];
+
+                    if (str_contains($documentId, '.')) {
+                        $documentId = explode('.', $documentId)[0];
+                        $documentUrl = $this->mainDomain.$this->router->generate('_detail', ['id' => $documentId]);
+                    }
+
+                    if (!empty($relatedItemText) && !empty($documentUrl)) {
+                        $relatedItem = $relatedItemText.' ('.$documentUrl.')';
+                    } elseif (!empty($relatedItemText)) {
+                        $relatedItem = $relatedItemText;
+                    }
+
                     $relatedItems[] = $relatedItem;
                 }
             }
@@ -364,8 +405,21 @@ class MetadataTransformer implements MetadataTransformerInterface
         $response = '';
         $responseNode = $xpath->query('//tei:relatedItem[@type = "letter" and @subtype = "response"]/tei:ref');
         if ($responseNode->item(0)) {
-            $response = $responseNode->item(0)->nodeValue;
-            $response = trim(preg_replace('/\s+/', ' ', $response));
+            $responseText = $responseNode->item(0)->nodeValue;
+            $responseText = trim(preg_replace('/\s+/', ' ', $responseText));
+            $refLink = $responseNode->item(0)->attributes->item(0)->textContent;
+            $documentId = array_reverse(explode('/', $refLink))[0];
+
+            if (str_contains($documentId, '.')) {
+                $documentId = explode('.', $documentId)[0];
+                $documentUrl = $this->mainDomain.$this->router->generate('_detail', ['id' => $documentId]);
+            }
+
+            if (!empty($responseText) && !empty($documentUrl)) {
+                $response = $responseText.' ('.$documentUrl.')';
+            } elseif (!empty($responseText)) {
+                $response = $responseText;
+            }
         }
 
         return $response;
diff --git a/templates/search/search.html.twig b/templates/search/search.html.twig
index ee2d98c4c15c88a4127249f42c7a44eccec8825b..a3cd6cbe72f1044d97764370c5a25e262dabc4fa 100755
--- a/templates/search/search.html.twig
+++ b/templates/search/search.html.twig
@@ -42,10 +42,10 @@
                 {% for document in documents %}
                     <div class="result_item">
                         {% if highlighting[document.id]['short_title'] is defined and highlighting[document.id]['short_title'] is not empty %}
-                            <h2><a href="{{ path('app_item_detail', {'id': document.id}) ~ "/#?searchTerm=" ~ app.request.get('q') ~ "&page=" ~ app.request.get('page') ~ "&source=gfl&redirectUrl=" ~ app.request.getSchemeAndHttpHost() ~ path('_search')}}">{{ highlighting[document.id]['short_title'][0]|raw }}</a></h2>
+                            <h2><a href="{{ path('_detail', {'id': document.id}) ~ "/#?searchTerm=" ~ app.request.get('q') ~ "&page=" ~ app.request.get('page') ~ "&source=gfl&redirectUrl=" ~ app.request.getSchemeAndHttpHost() ~ path('_search')}}">{{ highlighting[document.id]['short_title'][0]|raw }}</a></h2>
                         {% else %}
                             {% if document.short_title is defined %}
-                                <h2><a href="{{ path('app_item_detail', {'id': document.id}) ~ "/#?searchTerm=" ~ app.request.get('q') ~ "&page=" ~ app.request.get('page') ~ "&source=gfl&redirectUrl=" ~ app.request.getSchemeAndHttpHost() ~ path('_search')}}">{{ document.short_title }}</a></h2>
+                                <h2><a href="{{ path('_detail', {'id': document.id}) ~ "/#?searchTerm=" ~ app.request.get('q') ~ "&page=" ~ app.request.get('page') ~ "&source=gfl&redirectUrl=" ~ app.request.getSchemeAndHttpHost() ~ path('_search')}}">{{ document.short_title }}</a></h2>
                             {% endif %}
                         {% endif %}
                         <p>
@@ -100,7 +100,7 @@
                             {% endif %}
                         </p>
                         {% endif %}
-                        <p><a class="more" href="{{ path('app_item_detail', {'id': document.id}) }}">{{ 'More'|trans }}</a></p>
+                        <p><a class="more" href="{{ path('_detail', {'id': document.id}) }}">{{ 'More'|trans }}</a></p>
                     </div>
                 {% endfor %}
             </div>