Coonan, Timothy; Schwemma, Catherin; Roemerb, Gary; Garcelonc, David; Munsond, Linda (Mar 2005). "Decline of an Island Fox Subspecies to Near Extinction". The Southwestern Naturalist. 50: 32–41. doi:10.1894/0038-4909(2005)050<0032:DOAIFS>2.0.CO;2.
Haldane, J. B. S. (1927-07-01). "A Mathematical Theory of Natural and Artificial Selection, Part V: Selection and Mutation". Mathematical Proceedings of the Cambridge Philosophical Society. 23 (7): 838–844. Bibcode:1927PCPS...23..838H. doi:10.1017/S0305004100015644. ISSN1469-8064.
Haldane, J. B. S. (1927-07-01). "A Mathematical Theory of Natural and Artificial Selection, Part V: Selection and Mutation". Mathematical Proceedings of the Cambridge Philosophical Society. 23 (7): 838–844. Bibcode:1927PCPS...23..838H. doi:10.1017/S0305004100015644. ISSN1469-8064.
Haldane, J. B. S. (1927-07-01). "A Mathematical Theory of Natural and Artificial Selection, Part V: Selection and Mutation". Mathematical Proceedings of the Cambridge Philosophical Society. 23 (7): 838–844. Bibcode:1927PCPS...23..838H. doi:10.1017/S0305004100015644. ISSN1469-8064.