At: Iskop. Tsvetk. Rast. Ross., St.-Petersburg, 4 By: Vikulin S. V., Iljinskaja I. A., Ablajev A. G.
journalAt: Bulletin scientifique / Conseil des Académies des Sciences et des Arts de la RSF de Yougoslavie, Series, Section A, Sciences naturelles, techniques et médicales, 17, 7-8 By: Pantić S.
journalAt: Glasnik Prirodnjačkog Muzeja u Beogradu, Series, Serija A, Геолошке науке [Geološke nauke] [Минералогија, Геологија, Палеонтологија], 27 By: Pantić S.
journalAt: Palaeobotanist, 1962, 11, 1-2 By: Prakash U.
journalAt: Palaeobotanist, 1978, 27, 2 By: Bande M. B.
journalAt: Journal of the Indian Botanical Society, 61 By: Trivedi B. S., Srivastava R.
journalAt: Alcheringa, 37, 1 By: Shukla A., Mehrotra R. C., Guleria J. S.
journalAt: Taxon, 65, 6 By: Coiffard C., Mohr B. A. R.
journalAt: Bulletin des Centres de Recherches Exploration-Production Elf-Aquitaine, 9 By: Doyle J. A., Jardiné S. M., Doerenkamp A.
journalAt: Review of Palaeobotany and Palynology, 104, 3-4 By: Gerrienne P., Beeckman H., Damblon F., Doutrelepont H., Fairon M., Smith T.