1. Ashlock, D., Smucker, S., Stanley, A., Tesfatsion, L.: Preferential Partner Selection in an Evolutionary Study of the Prisoner’s Dilemma. BioSystems 37(1-2), 99–125 (1996)
2. Axelrod, R.: An Evolutionary Approach to Norms. American Political Science Review 80, 1095–1111 (1986)
3. Axelrod, R.: The Evolution of Cooperation. Basic Books, New York (1984)
4. Axelrod, R.: The Complexity of Cooperation. Princeton University Press, New York (1997)
5. Axtell, R.: The Emergence of Firms in a Population of Agents: Local Increasing Returns, Unstable Nash Equilibria, and Power Law Size Distributions. The Brookings Institution CSED Working Paper 3 (2000)