<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://digitalspyuk.cdnds.net/12/23/gaming_batman_arkham_city_armoured_edition_2.jpg>
<http://www.digitalspy.com/gaming/batman/news/a397821/batman-arkham-asylum-writer-paul-dini-explains-prequel-absence/>