1. Allendorf, F. W., 1983. Isolation, gene flow and genetic differentiation among populations. In ?Genetics and Conservation?, C. M.Schonewald-Cox, S. M.Chambers, B.MacBryde & L.Thomas, Eds. Benjamin/Cummings Publ. Comp. Inc. London, pp. 51?65.
2. Ayala, F. J., Powell, J. R. & Dobzhansky, T., 1971. Polymorphism in continental and island populations of Drosophila willistoni. Proc. natn. Acad. Sci. U.S.A. 68(10): 2480?2483.
3. Beattie, A. J. & Culver, D. C., 1979. Neighborhood sizes in Viola. Evolution 33(4): 1226?1229.
4. Bradshaw, A. D., 1972. Some of the evolutionary consequences of being a plant. Evol. Biol. 5: 25?46.
5. Brewer, G. J., 1970. An introduction to isozyme techniques. Academic Press, New York.