At: Abhandlungen der Deutschen Akademie der Wissenschaften zu Berlin, Class, Klasse für Chemie, Geologie und Biologie, 1955, 2 By: Remy R., Remy W.
journalAt: Uchenye zapiski Kazanskogo Gosudarstvennogo Universiteta, 115, 8 By: Antropov I. A.
journalAt: Doklady Akademii Nauk SSSR, 188, 6 By: Vologdin A. G.
journalAt: Trudy Instituta geologii i geofiziki Sibirskogo otdeleniya Akademii Nauk SSSR, 674 By: Luchinina V. A.
journalAt: Plant Systematics and Evolution, 241, 1-2 By: Leng Q., Friis E. M.
journalAt: Plant Biology, 27, 3 By: Wang D.-M., Pan Y., Zhou Y., Liu Lu., Qin M., Liu L.
bookAt: Iskop. Tsvetk. Rast. SSSR, Leningrad, Izdatel'stvo Nauka, Leningradskoe otdelenie, 1974, 1 By: Dorofeev P. I.
journalAt: Review of Palaeobotany and Palynology, 159, 1–2 By: Liu Y.-S., Jacques F. M. B.
journalAt: Memorias de la Real Academia de Ciencias y Artes de Barcelona, 3ª época, 28, 12 [586] By: Bataller Calatayud J. R.
bookAt: Geol. & Paleontol. Urala, Sverdlovsk, Institut Geologii i Geokhimii Ural'skogo Nauchnogo Centra Akademii Nauk SSSR, 1986 By: Shuysky V. P.