Wikipedia: Gelsenkirchen - Encyclopedia article about the city. - http://en.wikipedia.org/wiki/Gelsenkirchen
AufSchalke Arena - The arena will host four World Cup group matches and a quarter-final. Includes news, area information, directions, schedule, and a webcam. - http://www.aufschalke2006.de/index_english.php
Gelsenkirchen - Features tourist information, accommodation, and city information. - http://www.gelsenkirchen.de/English/