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journalAt: Journal of the Botanical Research Institute of Texas, 10, 1 By: Poinar G. O., Chambers K. L.
journalAt: Palaeontographica, Abtheilung, B, Paläophytologie, 220, 5-6 By: Li C.-S.
journalAt: University of California Publications in Geological Sciences, 33 By: Axelrod D. I.
journalAt: Trudy Geologicheskogo Instituta Akademii Nauk SSSR, 294 By: Sinelnikova V. N., Fotjanova L. I., Chelebaeva A. I., Skiba L. A., Lupikina E. G., Chepalyga A. L., Drushitz Yu. G.
journalAt: Földtani Közlöny, 82, 10-12 By: Pálfalvy I.
journalAt: Pan-American Geologist, 44, 1 By: Berry E. W.
bookAt: Beitr. Naturk. Preuss., Königsberg, In Commission bei W. Koch, 2 By: von Heer O.
journalAt: Acta Palaeobotanica, 57, 1 By: Kowalski R.
journalAt: IAWA Journal, 40, 3 By: Vanner M. R.