@articleHehenkamp_Leininger_1999, title=A note on evolutionary stability of Bertrand equilibrium, volume=9, DOI=10.1007/s001910050087, number=3, journal=Journal of Evolutionary Economics, publisher=Springer Nature, author=Hehenkamp, Burkhard and Leininger, Wolfgang, year=1999, pages=367–371 
LibreCat: /record/3410
DOI: 10.1007/s001910050087

@articleHehenkamp_Qin_Stuart_1999, title=Economic natural selection in Bertrand and Cournot settings, volume=9, DOI=10.1007/s001910050081, number=2, journal=Journal of Evolutionary Economics, publisher=Springer Nature, author=Hehenkamp, Burkhard and Qin, Cheng-Zhong and Stuart, Charles, year=1999, pages=211–224 
LibreCat: /record/3417
DOI: 10.1007/s001910050081