Bennett, J. H. (1958). The existence and stability of selectively balanced polymorphisms at a sex-linked locus. Australian Journal of Biological Sciences 11, 598–602.
Bundgaard, J. & Christiansen, F. B. (1972). Dynamics of polymorphisms. I. Selection components in an experimental population of Drosophila melanogaster. Genetics 71, 439–460.
Crow, J. F. (1948). Alternative hypotheses of hybrid vigor. Genetics 33, 477–487.
Crow, J. F. & Kimura, M. (1970). An Introduction to Population Genetics Theory. New York: Harper and Row.
Crozier, R. H. (1976). Why male-haploid and sex-linked genetic systems seem to have unusually sex-limited mutational genetic loads. Evolution 30, 623–624.
Drescher, W. (1964). The sex limited genetic load in natural populations of Drosophila melanogaster. American Naturalist 98, 167–171.
Haldane, J. B. S. (1926). A mathematical theory of natural and artificial selection: Part III. Proceedings of Cambridge Philosophical Society 23, 363–372.
Kidwell, M. G., Kidwell, J. F. & Sved, J. A. (1977). Hybrid dysgenesis in Drosophila melanogaster: A syndrome of aberrant traits including mutation, sterility and male recombination. Genetics 86, 813–833.
Li, C. C. (1955). Population Genetics. University of Chicago Press.
Lindsley, D. L. & Grell, E. H. (1968). Genetic variations of Drosophila melanogaster. Carnegie Institute Washington Publication, no. 627.
Mourão, C. A., Ayala, F. J. & Anderson, W. W. (1972). Darwinian fitness and adaptedness in experimental populations of Drosophila willistoni. Genetica 43, 552–574.
Prout, T. (1965). The estimation of fitnesses from genotypic frequencies. Evolution 19, 546–551.
Sperlich, D. & Karlik, A. (1970). The genetic conditions in heterozygous and homozygous populations of Drosophila. I. The fate of alien chromosomes. Genetica 41, 265–304.
Sved, J. A. (1971). An estimate of heterosis in Drosophila melanogaster. Genetical Research 18, 97–105.
Sved, J. A. (1975). Fitness of third chromosome homozygotes in Drosophila melanogaster. Genetical Research 25, 197–200.
Sved, J. A. & Ayala, F. J. (1970). A population cage test for heterosis in Drosophila pseudoobscura. Genetics 66, 97–113.
Temin, R. G. (1966). Homozygous viability and fertility loads in Drosophila melanogaster. Genetics 53, 27–46.
Tracey, M. L. & Ayala, F. J. (1974). Genetic load in natural populations: Is it compatible with the hypothesis that many polymorphisms are maintained by natural selection? Genetics 77, 569–589.