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bookAt: Morph. Pl., New York, Harper and Row, 3 By: Bold H. C.
bookAt: Morph. Vasc. Pl., New York–London, McGraw-Hill Book Company By: Eames A. J.
bookAt: Morph. Vasc. Pl., New York, McMillan By: Bierhorst D. W.
journalAt: Systematic Botany, 10, 2 By: Trivett M. L., Rothwell G. W.
journalAt: Phytomorphology, 44, 1-2 By: Prasad M.
journalAt: Journal of Paleontology, 11, 2 By: Peck R. E.
bookAt: Iskop. Tsvetk. Rast. SSSR, Leningrad, Izdatel'stvo Nauka, Leningradskoe otdelenie, 2 By: Dorofeev P. I.
journalAt: Review of Palaeobotany and Palynology, 168, 1 By: van der Ham R. W. J. M., van Konijnenburg-van Cittert J. H. A., Kieft B. K., Sachs A. W.
journalAt: Palaeobotanist, 55, 1-3 By: Naugolnykh S. V., Orlova O. A.