1. Abdala F, Jashashvili T, Rubidge BS, Van Den Heever J (2014) New material of Microgomphodon oligocynus (Eutherapsida, Therocephalia) and the taxonomy of southern African Bauriidae. In: Kammerer CF, Angielczyk KD, Frobisch J (eds) Early Evolutionary History of the Synapsida. Springer, Dordrecht, pp 209–231
2. Averianov AO, Lopatin AV (2014) On the phylogenetic position of monotremes (Mammalia, Monotremata). Paleontol J 48(4):426–446
3. Bellairs ADA, Kamal AM (1981) The chondocranium and the development of the skull in recent reptiles. In: Gans C, Parsons TS (eds) Biology of the Reptilia: Morphology F. Academic Press, Toronto, 11, pp 1–263
4. Bemmelen JFV (1901) Der Schadelbau der Monotremen. Denkschr med-naturw Ges Jena VI:729-798
5. Bonaparte JF (1962) Descripcion del craneo y mandibula de Exaeretodon frenguelli, Cabrera y su comparacion con Diademodontidae, Tritylodontidae y los Cinodontes sudamericanos. Publ Mus Municip Cienc Nat Mar del Plata 1:135–202