diff --git a/class_Filter.php b/class_Filter.php
index 56d58f0..7d85e22 100644
--- a/class_Filter.php
+++ b/class_Filter.php
@@ -78,6 +78,12 @@ private function compare($value, $operator, $reference) {
                 } else {
                     return (in_array($value, $reference));
                 }
+            case "not":
+                if (is_string($value)) {
+                    return (!in_array(strtolower($value),array_map('strtolower', $reference)));
+                } else {
+                    return (!in_array($value, $reference));
+                }
             case "le":
                 return ($value <= $reference);
             case "lt":
diff --git a/class_Publikationen.php b/class_Publikationen.php
index dbc85f6..40383eb 100644
--- a/class_Publikationen.php
+++ b/class_Publikationen.php
@@ -329,7 +329,7 @@ public function pubNachTyp($param = array(), $field = '', $content = '', $fsp =
         } else {
             foreach ($pubList as $array_type => $publications) {
                 // Zwischenüberschrift (= Publikationstyp), außer wenn nur ein Typ gefiltert wurde
-                if (empty($type)) {
+                if (empty($type) || strpos($type, '-') === 0 || strpos($type, ',') !== false) {
                     $title = Tools::getTitle('publications', $array_type, $param['display_language']);
                     if (!shortcode_exists('collapsibles') || $format != 'accordion') {
                         $output .= "<h3>";
diff --git a/class_Tools.php b/class_Tools.php
index 2e826fe..904e587 100644
--- a/class_Tools.php
+++ b/class_Tools.php
@@ -242,28 +242,51 @@ public static function publication_filter($year = '', $start = '', $end = '', $t
                 $type = str_replace(' ', '', $type);
                 $types = explode(',', $type);
                 foreach($types as $v) {
-                    $pubTyp[] = self::getType('publications', $v);
+                    if (strpos($v, '-') === 0) {
+                        $tmpType = substr($v, 1);
+                        $pubTypExclude[] = self::getType('publications', $tmpType);
+                    } else {
+                        $pubTyp[] = self::getType('publications', $v);
+                    }
                 }
             } else {
-                $pubTyp = (array) self::getType('publications', $type);
+                if (strpos($type, '-') === 0) {
+                    $tmpType = substr($type, 1);
+                    $pubTypExclude = (array)self::getType('publications', $tmpType);
+                } else {
+                    $pubTyp = (array)self::getType('publications', $type);
+                }
             }
-            if (empty($pubTyp)) {
+            if (empty($pubTyp) && empty($pubTypExclude)) {
                 $output = '<p>' . __('Falscher Parameter für Publikationstyp', 'fau-cris') . '</p>';
                 return $output;
             }
-            $filter['publication type__eq'] = $pubTyp;
+            if (!empty($pubTyp)) {
+                $filter['publication type__eq'] = $pubTyp;
+            } elseif (!empty($pubTypExclude)) {
+                $filter['publication type__not'] = $pubTypExclude;
+            }
         }
         if ($subtype !== '' && $subtype !== NULL) {
             $subtype = str_replace(' ', '', $subtype);
             $subtypes = explode(',', $subtype);
             foreach($subtypes as $v) {
-                $pubSubTyp[] = self::getType('publications', $v, $pubTyp[0]);
+                if (strpos($v, '-') === 0) {
+                    $tmpSubType = substr($v, 1);
+                    $pubSubTypExclude[] = self::getType('publications', $tmpSubType, $pubTyp[0]);
+                } else {
+                    $pubSubTyp[] = self::getType('publications', $v, $pubTyp[0]);
+                }
             }
-            if (empty($pubSubTyp)) {
+            if (empty($pubSubTyp) && empty($pubSubTypExclude)) {
                 $output = '<p>' . __('Falscher Parameter für Publikationssubtyp', 'fau-cris') . '</p>';
                 return $output;
             }
-            $filter['subtype__eq'] = $pubSubTyp;
+            if (!empty($pubSubTyp)) {
+                $filter['subtype__eq'] = $pubSubTyp;
+            } elseif (!empty($pubSubTypExclude)) {
+                $filter['subtype__not'] = $pubSubTypExclude;
+            }
         }
         if ($fau !== '') {
             if ($fau == 1) {