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2. Palaeo-oxygenation: effects and recognition;Allison,1995
3. La limite Permien-Trias dans quelques localités du Moyen-Orient recherches stratigraphiques et micropaléontologiques;Altiner;Rivista Italiana di Paleontologia e Stratigrafia,1980
4. A new Upper Triassic flora and associated invertebrate fossils from the basal beds of the Chinle Formation, near Cameron, Arizona;Ash;Paleobios,2005
5. The Permian–Triassic boundary in the Southern Alps (Italy);Assereto,1973