At: Documenta naturae, 93 By: Uzunova K.
journalAt: Palaeobotanist, 1989, 38 By: Awasthi N., Srivastava R.
journalAt: Nature, 50 By: Seward A. C.
journalAt: Bulletin of the Buffalo Society of Natural Sciences, 17, 1 By: Arnold C. A.
journalAt: Rapport annuel du Departement de Géologie et de Minéralogie du Musée Royal de l'Afrique Centrale, 1985–1986 By: Bande M. B., Dechamps R., Lakhanpal R. N., Prakash U.
journalAt: Palaeobotanist, 67, 1 By: Awasthi N., Mehrotra R. C., Shukla A.
journalAt: Journal of Biological Sciences, 9, 1-2 By: Nambudiri E. M. V.
journalAt: Acta Palaeontologica Polonica, 25, 2 By: Fuglewicz R.
journalAt: Časopis pro mineralogii a geologii, 17, 3 By: Konzalová M.
journalAt: Palaeobotanist, 1970, 19, 2 By: Singh H. P., Kumar P.