O. Cuellar og C.O. McKinney (1976). «Natural hybridization between parthenogenetic and bisexual lizards: detection of uniparental source by skin grafting». J. Exp. Zool.. 196 (3): 341–350. ISSN1932-5231. doi:10.1002/jez.1401960308.
M. Ogielska, P. Kierzkowski og M. Rybacki (2004). «DNA content and genome composition of diploid and triploid water frogs belonging to the Rana esculenta complex (Amphibia, Anura)». Can. J. Zool.. 82 (12): 1894–1901. ISSN1480-3283. doi:10.1139/Z04-188.
R.F. Furlong og P.W.H. Holland (2002). «Were vertebrates octoploid?». Phil. Trans. R. Soc. Lond. B. 357 (1420): 531–544. ISSN1471-2970. doi:10.1098/rstb.2001.1035.
O. Cuellar og C.O. McKinney (1976). «Natural hybridization between parthenogenetic and bisexual lizards: detection of uniparental source by skin grafting». J. Exp. Zool.. 196 (3): 341–350. ISSN1932-5231. doi:10.1002/jez.1401960308.
M. Ogielska, P. Kierzkowski og M. Rybacki (2004). «DNA content and genome composition of diploid and triploid water frogs belonging to the Rana esculenta complex (Amphibia, Anura)». Can. J. Zool.. 82 (12): 1894–1901. ISSN1480-3283. doi:10.1139/Z04-188.
R.F. Furlong og P.W.H. Holland (2002). «Were vertebrates octoploid?». Phil. Trans. R. Soc. Lond. B. 357 (1420): 531–544. ISSN1471-2970. doi:10.1098/rstb.2001.1035.