Daniel Dardailler (15 July 1996). "The XPM Story". Colas Nahaboo and Arnaud Le Hors. Archived from the original on 2 January 2014. Retrieved 1 January 2014.
web.archive.org
Daniel Dardailler (15 July 1996). "The XPM Story". Colas Nahaboo and Arnaud Le Hors. Archived from the original on 2 January 2014. Retrieved 1 January 2014.
QingLong, Lu (24 March 1998). "Arena change history". Yggdrasil Computing. Archived from the original on 28 February 2003. Retrieved 27 February 2014.