1. More Effective Choice in the Prisoner's Dilemma";Robert Axelrod;Journal of Conflict Resolution,1980
2. Individual Behavior in Oligopolistic Markets: An Experimental Study;James W Friedman;Yale Economic Essays,1963
3. An Experimental Study of Cooperative Duopoly;James W Friedman;Econometrica,1967
4. A Non-Cooperative Equilibrium for Supergames;James W Friedman;Review of Economic Studies,1971