At: Meot. Fl. Sev.-Zap. Prichernomor., Chișinău [Kishinev], Știință [Shtiintsa] By: Negru A. G.
journalAt: Botanichnyi Zhurnal, 8, 3 By: Dorofeev P. I.
journalAt: Geologie, 3, 5 By: Horst U.
bookAt: Merkw. Verstein., Gotha, Becker'sche Buchhandlung, 1-2 By: Schlotheim E. F.
journalAt: Journal of the Indian Botanical Society, 1953, 32, 4 By: Suryanarayana K.
journalAt: Canadian Journal of Botany, 65, 11 By: McIver E. E., Basinger J. F.
journalAt: Norsk Polarinstitutt Skrifter, 192 By: Bose M. N., Manum S. B.
journalAt: Israel journal of botany, 41, 1 By: Raviv V., Lorch J. W.
bookAt: Ginkgo biloba, Tokyo, Springer By: Zhou Z.-Y.
journalAt: Pan-American Geologist, 41, 1 By: Berry E. W.