At: Review of Palaeobotany and Palynology, 14, 1-2 By: Chaloner W. G.
journalAt: International Journal of Coal Geology, 83, 2-3 By: Cressler W. L., Prestianni C., LePage B. A.
journalAt: Senckenbergiana Lethaea, 47, 3 By: Kräusel R., Venkatachala B. S.
journalAt: Geološki anali Balkanskoga poluostrva, 27 By: Pantić N.
bookAt: Dev. Fl. Bol'sh. Donb., Kiev, Naukova dumka By: Istchenko T. A.
bookAt: Polev. Atlas Fauny Fl. Devonsk. Otlozh. Minus., Moscow, Gosgeoltekhizdat By: Kryshtofovich A. N.
journalAt: Materialy po geologii Tsentral'nogo Kazakhstana, 8 By: Jurina A. L.
bookAt: Paleontol. Sbornik (Moscow & Leningrad), Moscow & Leningrad, Gosudarstvennoe nauchno-tekhnicheskoe izdatel'stvo neftjanoj i gorno-toplivnoj literatury, 1 By: Reitlinger E. A.
journalAt: Trudy Geologicheskogo Instituta Akademii Nauk SSSR, 143 By: Pojarkov B. V.
journalAt: Paleontologicheskii Zhurnal, 1984, 3 By: Senkevitsch M. A.