The Havannah Challenge. - Jan Krabbenbos; Ton van der Valk (J. Int. Comput. Games Assoc., 2012)

Mohex Wins 2015 Hex 11×11 and Hex 13×13 Tournaments. - Ryan Hayward; Jakub Pawlewicz; Kei Takada; Ton van der Valk (J. Int. Comput. Games Assoc., 2017)