public function get_authors() {
		$authors = array();

		$url = $this->get_value('http://purl.org/ontology/bibo/authorList');
		$info = $this->data[$url];
		foreach ($info as $k => $v) {
			if (strpos($k, '#type') !== false) {
				continue;
			}

			$authors[] = $this->get_author($v[0]['value']);
		}

		return $authors;
	}