Evolving the tactics of play fighting: insights from simulating the "keep away game" in rats. - Heather C. Bell; Greg D. Bell; Jeffrey A. Schank; Sergio M. Pellis (Adapt. Behav., 2015)

Evolutionary models for the retention of adult-adult social play in primates: The roles of diet and other factors associated with resource acquisition. - Brian C. O'Meara; Kerrie Lewis Graham; Sergio M. Pellis; Gordon M. Burghardt (Adapt. Behav., 2015)

Modeling play: distinguishing between origins and current functions. - Sergio M. Pellis; Gordon M. Burghardt; Elisabetta Palagi; Marc Mangel (Adapt. Behav., 2015)