public function getSimilarRecommLists()
    {
        if ($this->_oOtherRecommList === null) {
            $this->_oOtherRecommList = false;
            if (($oActiveRecommList = $this->getActiveRecommList()) && ($oList = $this->getArticleList())) {
                $oRecommLists = $oActiveRecommList->getRecommListsByIds($oList->arrayKeys());
                //do not show the same list
                unset($oRecommLists[$oActiveRecommList->getId()]);
                $this->_oOtherRecommList = $oRecommLists;
            }
        }

        return $this->_oOtherRecommList;
    }