At: Palaeobotanist, 1993, 42, 2 By: Srivastava R., Awasthi N.
journalAt: Knihovnička zemního plynu a nafty, 4 By: Knobloch E., Mai D. H.
journalAt: Paleontologicheskii Zhurnal, 1977, 3 By: Meyen S. V.
journalAt: American Journal of Botany, 70, 3 By: Thomasson J. R.
journalAt: Gondwana geological magazine, 20, 1 By: Bhowal M., Sheikh M. T.
journalAt: International Journal of Plant Sciences, 169, 7 By: von Balthazar M., Pedersen K. R., Crane P. R., Friis E. M.
bookAt: Iskop. Tsvetk. Rast. SSSR, Leningrad, Izdatel'stvo Nauka, Leningradskoe otdelenie, 2 By: Budantsev L. Yu.
bookAt: Iskop. Tsvetk. Rast. SSSR, Leningrad, Izdatel'stvo Nauka, Leningradskoe otdelenie, 2 By: Dorofeev P. I.
journalAt: Documenta naturae, 32 By: Knobloch E.
journalAt: Annals of Botany, 82, 4 By: Doweld A. B.