1. G H Hardy, Mendelian proportions in a mixed population, Science, Vol.28, pp.49–50, 1908.
2. D L Hartl and A G Clark, Principles of Population Genetics, 2nd Edition, pp.45–57, 1989. Sinauer, Sunderland. (pp.95–106 in the 3rd Edition,Sinauer, Sunderland, 1997).