References
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Bell, W. A. (1962): Flora of Pennsylvanian Pictou Group of New Brunswick. – Bulletin, Geological Survey of Canada 87: 1–71.
Leonardi, P. (1953): Flora continentale ladinica delle Dolomiti. – Memorie dell'Istituto Geologico della R. Università di Padova 18(2): 1–22, 4 pls.
Knowlton, F. H. (1924): Flora of the Animas Formation. – Professional Papers, United States Geological Survey 134: 71–117, XIX pls.
Kidston, R. (1923): Fossil plants of the Carboniferous rocks of Great Britain. – Memoirs of the Geological Survey of Great Britain, Palaeontology 2(4): 275–376 + pls 69–91.
Seward, A. C. (1919): Fossil Plants. A text-book for students of botany and geology. Volume IV: Ginkgoales, Coniferales, Gnetales. Cambridge University Press: xvi + 543 pp..
Bayer, E. (1914): Fytopaleontologické příspěvky ku poznání českých křídových vrstev peruckých. – Archiv pro přírodovědecké prozkoumání Čech 15(5): 1–66.
Berry, E. W. (1914): Fruits of a date palm in the Tertiary deposits of eastern Texas. – American Journal of Science, Ser. 4 37: 403–406.
White, C. D. (1899): Fossil flora of the lower coal measures of Missouri. – Monographs of the United States Geological Survey 37: 467.
Feistmantel, O. (1871): Fruchtstände fossiller Pflanzen aus der böhmischen Steinhohlenformation. – Sitzungsberichte der königlichen Böhmischen Gesellschaft der Wissenschaften. Mathematisch-naturwissenschaftliche Classe 1871: 43–61.
Heer, O. (1855): Flora tertiaria Helvetiae, vol. 1. Verlag der Lithographischen Anstalt von J. Wurster & Compagnic, Wintherthur.