At: Věstník Ústředního Ústavu Geologického, 59, 3 By: Vavrdová M.
journalAt: Palaeobotanist, 1965, 14, 1-3 By: Rásky K.
journalAt: Annals and Magazine of Natural History, Series 12, 8, 91 By: Chesters K. I. M.
journalAt: Science reports of South College, North College of Osaka University, 1958, 7 By: Kobatake N.
journalAt: Acta Universitatis Carolinae, Series, Geologica, 1982, 4 By: Pacltová B.
journalAt: Bulletin of the Torrey Botanical Club, 1938, 65, 9 By: Read C. B.
journalAt: Palaeobotanist, 1977, 26, 3 By: Zeba-Bano
journalAt: Transactions of the Royal Society of Edinburgh, 64, 15 By: Long A. G.
journalAt: Proceedings of the Section of Science / Koninklijke Akademie van Wetenschappen te Amsterdam, 27, 3-4 By: Posthumus O.
journalAt: American Naturalist, 42, 501 By: Cockerell T. D. A.