At: Palaeontographica, Abtheilung, B, Paläophytologie, 103, 4–6 By: Couper R. A.
bookAt: Brit. Purbeck Charoph., London, The Trustees of the British Museum (Natural History) By: Harris T. M.
journalAt: Compte rendu sommaire de la Société Géologique de France, 1968, 4 By: Segonzac G.
journalAt: Review of Palaeobotany and Palynology, 6, 1 By: Krutzsch W.
journalAt: Botanicheskii Zhurnal, 1994, 79, 5 By: Budantsev L. Yu., Gendels T. V., Fotjanova L. I.
bookAt: Iskop. Tsvetk. Rast. SSSR, Leningrad, Izdatel'stvo Nauka, Leningradskoe otdelenie, 2 By: Dorofeev P. I.
journalAt: Journal of the Hattori Botanical Laboratory, 71 By: Ignatov M. S.
bookAt: Handb. Paläobot., München–Berlin, R. Oldenbourg, 1 By: Troll W.
bookAt: Traité Paléobot., Paris, Masson, 2 By: Jovet-Ast S.
journalAt: Journal of the Hattori Botanical Laboratory, 74 By: Grolle R.