1. Ayala, F., M. Tracey, L. Barr, J. McDonald, and S. Perez-Salas. 1974. Genetic variation in natural populations of five Drosophila species and the hypothesis of the selective neutrality of protein polymorphisms. Genetics 7: 226–235.
2. Beatty, J. 1984. Chance and natural selection. Philosophy of Science 51: 183–211.
3. Beatty, J. 1987a. Weighing the risks: Stalemate in the classical/balance controversy. Journal of the History of Biology 20(1987): 289–319.
4. Beatty, J. 1987b. Natural selection and the null hypothesis. In The latest on the best, ed. John Dupre. Cambridge: MIT Press.
5. Crow, J.F. 1969. Molecular genetics and population genetics. Proceedings of the Twelfth International Congress of Genetics 3: 105–113.