^Smith, R. M. H. and Botha, J. (2005). The recovery of terrestrial vertebrate diversity in the South African Karoo Basin after the End-Permian extinction and it disappeared completely soon after. Comptes Rendus Palevol4:555–568.
^Ward, P. D., Botha, J., Buick, R., De Kock, M. O., Erwin, D. H., Garrison, G., Kirschvink, J. L., and Smith, R. (2005). Abrupt and gradual extinction among Late Permian land vertebrates in the Karoo Basin, South Africa. Science307:709–714.
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