1. Sobre Pareiasaurus americanus sp. nov., do Permiano Superior do Rio Grande do Sul, Brasil. I — Diagnose especifica;Araùjo;Anais Academia brasilleira Ciências,1985
2. Tétrapodos fosiles de Sudamérica y dériva continental;Barberena,1975
3. Terrestrial vertebrate fossils from Ecca- defined beds in South Africa;Barry,1970
4. A new dicynodont ancestor from the Upper Ecca (lower Middle Permian) of South Africa;Barry;Annals South African Museum,1974
5. Les genres Dicynodon et Lystrosaurus (Therapsida, Dicynodontia) en Eurasie: une mise au point;Battail;Geobios MS,1997