1. Armengol, R. M., 1986, Relaciones filogéneticas en el cluster mulleri de Drosophila, Tesis de Licenciatura, Universidad Autónoma de Barcelona, (Bellatera), Barcelona.
2. Ayala, F. J., and Powell, J. R., 1972, Allozymes as diagnostic characters of sibling species of Drosophila, Proc. natn. Acad. Sci. USA 69:1094–1096.
3. Ayala, F. J., Powell, J. R., Tracey, M. L., Mauro, C. A., and Pérez-Salas, S., 1972, Enzyme variability in the Drosophila willistoni group. IV. Genic variation in natural populations of Drosophila willistoni, Genetics 70:113–139.
4. Barker, J. S. F., and Mulley, J. C., 1976, Isozyme variation in natural populations of Drosophila buzzatii, Evolution 30:213–233.
5. Barker, J. S. F., and Starmer, W. T., 1982, Ecological Genetics and Evolution: The Cactus-Yeast-Drosophila Model System, Academic Press Australia, Sydney.