1. The geochronology and significance of ash-fall tuffs in the glaciogenic Carboniferous-Permian Dwyka Group of Namibia and South Africa;Bangert;Journal African Earth Sciences,1999
2. Evidence of glaciation in the lower part of the Karoo system in Southern Rhodesia;Bond;Transactions Geological Society South Africa,1952
3. Evolution and development of the Karoo Basin;Cole,1992
4. Gondwana fluids and subsurface palæohydrology of the Cape Fold Belt and the Karoo Basin, South Africa;Egle;Journal African Earth Sciences,1998
5. Palyno-Stratigraphy of the Lower Karoo sequence in the Central Sebungwe District;Falcon,1975