1998

Beaufils, B.; Delahaye, J.-P. & Mathieu, P. (1998), Complete Classes of Strategies for the Classical Iterated Prisoner's Dilemma, in V. W. Porto; N. Saravanan; D. Waagen & A. E. Eiben, ed., 'Evolutionary Programming VII' , Springer, Berlin , pp. 33--41 .

1997

Beaufils, B.; Delahaye, J.-P. & Mathieu, P. (1997), 'Our Meeting With Gradual: A Good Strategy For The Iterated Prisoner's Dilemma', .