Jonathan Schaeffer, Neil Burch, Yngvi Björnsson, Akihiro Kishimoto, Martin Müller, Robert Lake, Paul Lu, and Steve Sutphen (19 July 2007). “Checkers Is Solved”. Science. doi:10.1126/science.1144079. 2008年4月19日閲覧。
Jonathan Schaeffer, Neil Burch, Yngvi Björnsson, Akihiro Kishimoto, Martin Müller, Robert Lake, Paul Lu, and Steve Sutphen (19 July 2007). “Checkers Is Solved”. Science. doi:10.1126/science.1144079. 2008年4月19日閲覧。