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journalAt: Trudy Botanicheskogo Instituta Akademii Nauk SSSR, Series, 1, Flora i sistematika vysshikh rastenii, 11 By: Dorofeev P. I.
journalAt: Nymphaea, 6 By: Şuraru M., Şuraru N., Givulescu R.
bookAt: Iskop. Tsvetk. Rast. SSSR, Leningrad, Izdatel'stvo Nauka, Leningradskoe otdelenie, 1974, 1 By: Imchanitzkaja N. N.
journalAt: Transactions and proceedings of the Palaeontological Society of Japan, New Series, 103 By: Komura S.
journalAt: Taxon, 20, 4 By: Hueber F. M.
journalAt: Annals of Botany, 50, 5 By: Friis E. M., Skarby A.
journalAt: Tertiary research, 9, 1-4 By: Palamarev E. Kh.
journalAt: Review of Palaeobotany and Palynology, 189 By: Mohr B. A. R., Coiffard C., Bernardes-de-Oliveira M.
journalAt: Acta Palaeobotanica, 42, 2 By: Wójcicki J. J., Kvaček Z.