Hehenkamp, Burkhard, and Wolfgang Leininger. “A Note on Evolutionary Stability of Bertrand Equilibrium.”https://doi.org/10.1007/s001910050087__Journal of Evolutionary Economics 9, no. 3 (1999): 367–71.https://doi.org/10.1007/s001910050087 .

Hehenkamp, Burkhard, Cheng-Zhong Qin, and Charles Stuart. “Economic Natural Selection in Bertrand and Cournot Settings.”https://doi.org/10.1007/s001910050081__Journal of Evolutionary Economics 9, no. 2 (1999): 211–24.https://doi.org/10.1007/s001910050081 .