public function summaryFields()
    {
        $summaryFields = parent::summaryFields();
        $summaryFields = array_merge(
            $summaryFields, array(
                'Title'       => _t('News.TITLE', 'Title'),
                'Author'      => _t('News.AUTHOR', 'Author'),
                'PublishFrom' => _t('News.PUBLISH', 'Publish from'),
                'Status'      => _t('News.STATUS', 'Status'),
            )
        );

        return $summaryFields;
    }