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journalAt: Algologiya, 3, 2 By: Saidakovsky L. Ya.
journalAt: Trudy Instituta Geologii i Geokhimii Ural'skogo Nauchnogo Tsentra Akademii Nauk SSSR, 1974, 109 By: Tchuvashov B. I.
journalAt: Izvestiya Akademii Nauk SSSR, Series, 7, Otdeleniye fiziko-matematicheskikh nauk, 1929, 2 By: Zalessky M. D.
bookAt: Iskop. Tsvetk. Rast. SSSR, Leningrad, Izdatel'stvo Nauka, Leningradskoe otdelenie, 1974, 1 By: Imchanitzkaja N. N.
journalAt: Heolohichnyj Zhurnal, 20, 3 By: Istchenko A. M., Semenova E. V.
bookAt: Iskop. Tsvetk. Rast. Ross., St.-Petersburg, 4 By: Iljinskaja I. A., Pneva G. P.
bookAt: Iskop. Tsvetk. Rast. Ross., St.-Petersburg, 4 By: Arbuzova O. N.
journalAt: Rivista Italiana di Paleontologia e Stratigrafia, 110, 3 By: Vaez-Javadi F.
journalAt: American Journal of Botany, 59, 9 By: Kasper A. E., Andrews H. N.