1. Allendorf, F W, and Leary, R F. 1986. Heterozygosity and fitness in natural populations of animals. In: Soulé, M. E. (ed.) Conservation Biology The Science of Scarcity and Diversity, Sinauer Assoc. Inc., Sunderland. MA.
2. Bell, M A. 1974. Reduction and loss of the pelvic girdle in Gasterosteus (Pisces): A case of parallel evolution. Natural History Museum, Los Angeles Country, Contributions to Science, 257, 1–36.
3. Bell, M A. 1984. Evolutionary phenetics and genetics: the threespine stickleback, Gasterosteus aculeatus, and related species. In: Turner, B. J. (ed.) Evolutionary Genetics of Fishes, Plenum Press, New York.
4. Bell, M A. 1987. Interacting evolutionary constraints in pelvic reduction of threespine sticklebacks, Gasterosteus aculeatus (Pisces, Gasterosteidae). Biological Journal of the Linnean Society, 31, 347–382.
5. Bell, M A. 1988. Stickleback fishes: Bridging the gap between population biology and paleobiology. Trends in Ecology and Evolution, 3, 320–325.