1. Anderson, J.M., Anderson, H.M., 1985. Paleoflora of Southern Africa, Prodromus of South African Megafloras Devonian to Lower Cretaceous, vol. 1. Balkema, A.A., Rotterdam.
2. Sakmarian brachiopods from Southern Oman;Angiolini;Permophiles,1995
3. Late Permian fauna from the Khuff Formation, South Oman;Angiolini;Permophiles,1996
4. Early Permian (Sakmarian) Brachiopods from the Southeastern Oman;Angiolini;Geobios,1997
5. Permian palynostratigraphy of the Collie Basin, Western Australia;Backhouse;Rev. Palaeobot. Palynol.,1991