Export problem of references

XMLCustomWriter::createChildWithText($doc, $root, 'pages', $article->getPages(), false);
		XMLCustomWriter::createChildWithText($doc, $root, 'citations', $article->getCitations(), false); 
		$fullTextUrl =& XMLCustomWriter::createChildWithText($doc, $root, 'fullTextUrl', Request::url(null, 'article', 'view', $article->getId()));
		XMLCustomWriter::setAttribute($fullTextUrl, 'format', 'html');