1. Barton, N.H. and Hewitt, G.M., Adaptation, speciation, and hybrid zones, Nature, 1989, vol. 341, pp. 497—503.
2. Verspoor, E. and Hammar, J., Introgressive hybridization in fishes: the biochemical evidence, J. Fish Biol., 1991, vol. 39, pp. 309—334.
3. Carmichael, G.J., Hanson, J.N., Schmidt, M.E., and Morizot, D.C., Introgression among apache, cutthroat, and rainbow trout in Arizona, Trans. Am. Fish. Soc., 1993, vol. 122, pp. 121—130.
4. Taylor, E.B., Evolution in mixed company—evolutionary influences from studies of natural hybridization in Salmonidae, in Evolution Illuminated: Salmon and Their Relatives, Hendry, A.P. and Stearns, S.C., Eds., Oxford: Oxford Univ. Press, 2004, pp. 232—263.
5. Arnold, M.L., Natural Hybridization and Evolution, Oxford: Oxford Univ. Press, 1997.