At: Bulletin of the Torrey Botanical Club, 91, 3 By: Becker H. F.
journalAt: Monthly Microscopical Journal, Series 3, 16, October By: Williamson W.
journalAt: Phytomorphology, 39, 1 By: Trivedi B. S., Srivastava R.
journalAt: Ameghiniana, 42, 4 By: Pujana R. R.
journalAt: Palaeobotanist, 2011, 60, 2 By: Guleria J. S., Shukla A.
journalAt: Journal of the Institute of Polytechnics, Osaka City University, Series, D. Biology, 9 By: Miki S.
journalAt: A Magyar Állami Földtani Intézet évkönyve, 44, 1 By: Varga I.
journalAt: Journal of the Washington Academy of Sciences, 27, 12 By: Berry E. W.
journalAt: Geološki vjesnik, 35 By: Sokač B., Velić I.
journalAt: Neues Jahrbuch für Geologie und Paläontologie Monatshefte, 1964, 10 By: Knobloch E.