protected function createReference($row, $thread) {
$query = "INSERT INTO #__kunenadiscuss (content_id, thread_id) VALUES(
{$this->_db->quote($row->id)},
{$this->_db->quote($thread)})";
$this->_db->setQuery ( $query );
$this->_db->query ();
CKunenaTools::checkDatabaseError ();
}