1. The Geometry of Population Genetics;Akin,1979
2. The Evolution of Cooperation;Axelrod,1984
3. Evolutionary and continuous stability;Eshel;J. Theor. Biol.,1983
4. Kin selection and strong evolutionary stability of mutual help;Eshel;Theor. Pop. Biol.,1981
5. Three characterizations of strategy stability;Hines;J. Appl. Prob.,1980