diff -r 265992e5b379 -r b5cff30efa0a server/src/app/Repositories/RdfDocumentRepository.php
--- a/server/src/app/Repositories/RdfDocumentRepository.php	Mon Feb 06 13:23:39 2017 +0100
+++ b/server/src/app/Repositories/RdfDocumentRepository.php	Mon Feb 06 14:36:25 2017 +0100
@@ -123,6 +123,9 @@
         if(isset($doc->modified)) {
             $newGraph->add($doc->doc, "http://purl.org/dc/terms/modified", $doc->modified);
         }
+        if(isset($doc->created)) {
+            $newGraph->add($doc->doc, "http://purl.org/dc/terms/created", $doc->created);
+        }
         if(isset($doc->publishers)) {
             $newGraph->add($doc->doc, "http://purl.org/dc/elements/1.1/publisher", $doc->publishers);
         }
@@ -225,6 +228,9 @@
 
         $sparqlQuery = sprintf(self::BASE_DOC_QUERY.$sortClauseStr.$limitsClausesStr, $filterUris);
 
+        Log::debug("SPARQL QUERY :");
+        Log::debug($sparqlQuery);
+
         $docs = $this->sparqlClient->query($sparqlQuery);
 
         foreach($docs as $doc) {