The usefulness of tag bits in changing environments. - William C. Liles; Kenneth A. De Jong (CEC, 1999)

Analyzing cooperative coevolution with evolutionary game theory. - R. Paul Wiegand; William C. Liles; Kenneth A. De Jong (IEEE Congress on Evolutionary Computation, 2002)

Modeling Variation in Cooperative Coevolution Using Evolutionary Game Theory. - R. Paul Wiegand; William C. Liles; Kenneth A. De Jong (FOGA, 2002)

The Effects of Representational Bias on Collaboration Methods in Cooperative Coevolution. - R. Paul Wiegand; William C. Liles; Kenneth A. De Jong (PPSN, 2002)