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 | | Efremov, I. A., On the Subclass Batrachosauria- an intermediary group between amphibians and reptiles: Bulletin de l’Academie des Sciences de l’Union des Republiques Sovietiques Socialistes, Biologie, v. |
 | | Owen, R., 1876, Descriptive and illustrated catalogue of the Fossil Reptilia of South Africa in the British Museum. |
 | | Panchen, A. L., 1970, Batrachosauria, Part A, Anthracosauria: Handbuch der Palaoherpetologie, p.1-84. |
| www.paleofile.com /Demo/Mainpage/Taxalist/Anapsida.htm (5111 words) |
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