diff --git a/typo3/sysext/filelist/Classes/FileList.php b/typo3/sysext/filelist/Classes/FileList.php
index 6b8fb6d..470aad8 100644
--- a/typo3/sysext/filelist/Classes/FileList.php
+++ b/typo3/sysext/filelist/Classes/FileList.php
@@ -384,7 +384,54 @@ class FileList extends AbstractRecordList
 
             $folders = $storage->getFoldersInFolder($this->folderObject, $foldersFrom, $foldersNum, true, false, trim($this->sort), (bool)$this->sortRev);
             $files = $this->folderObject->getFiles($filesFrom, $filesNum, Folder::FILTER_MODE_USE_OWN_AND_STORAGE_FILTERS, false, trim($this->sort), (bool)$this->sortRev);
-            $this->totalItems = $foldersCount + $filesCount;
+            
+            // HF-MOD: START - Ref sorting
+
+            if (trim($this->sort) === '_REF_') {
+                $filesWithRefs = [];
+
+                foreach ($files as $name => $file) {
+                    $databaseConnection = $this->getDatabaseConnection();
+                    $table = 'sys_refindex';
+                    $referenceCount = $databaseConnection->exec_SELECTcountRows(
+                        '*',
+                        $table,
+                        'ref_table=' . $databaseConnection->fullQuoteStr('sys_file', $table)
+                        . ' AND ref_uid=' . (int)$file->getUid()
+                        . ' AND deleted=0'
+                        . ' AND tablename != ' . $databaseConnection->fullQuoteStr('sys_file_metadata', $table)
+                    );
+
+                    $filesWithRefs[$name] = [
+                        'refs' => $referenceCount,
+                        'file' => $file,
+                    ];
+                }
+
+                uasort($filesWithRefs, function ($a, $b) {
+                    if ($a['refs'] == $b['refs']) {
+                        return 0;
+                    }
+
+                    if ((bool) $this->sortRev) {
+                        return ($a['refs'] < $b['refs']) ? 1 : -1;
+                    }
+
+                    return ($a['refs'] < $b['refs']) ? -1 : 1;
+                });
+
+                $files = [];
+
+                foreach ($filesWithRefs as $name => $file) {
+                    $files[$name] = $file['file'];
+                }
+
+            }
+
+            // HF-MOD: END - Ref sorting
+
+
+	    $this->totalItems = $foldersCount + $filesCount;
             // Adds the code of files/dirs
             $out = '';
             $titleCol = 'file';