References
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Upchurch, G. R., Jr. & Dilcher, D. L. (1990): Cenomanian angiosperm leaf megafossils from the Rose Creek locality of the Dakota Formation, southeastern Nebraska. – Bulletin of the United States Geological Survey 1915: 1–55, 31 pls.
Covington, J. M. & Wise, S. W. (1987): Calcareous nannofossil biostratigraphy of a Lower Cretaceous deep sea fan complex: Deep Sea Drilling Project Leg 93, Site 603, lower continental rise off Cape Hatteras. – Initial Reports of the Deep Sea Drilling Project 93: 617–660.
Gregor, H. -J. (1984): Chenopodium wetzleri nov. spec. – Erstnachweis der Gattung Chenopodium Linné in der Oberen Süßwassermolasse Bayerns. in Molasseforschung '84: zum Gedenken an August Wetzler (1812-1881). Historischer Verein Günzburg e.V., Günzburg: 22–24, figs 1–13.
Knobloch, E. & Mai, D. H. (1983): Carbonized seeds and fruits from the Cretaceous of Bohemia and Moravia and their stratigraphical significance. in Brzobohatý, R.: Miscellanea micropalaeontologica: A memorial volume dedicated to the 18th European colloquy on micropalaeontology. Moravské naftové doly, Hodonín: 305–332.
Krassilov, V. A. (1973): Cuticular structure of Cretaceous angiosperms from the Far East of the USSR. – Palaeontographica, Abt. B 142(4–6): 105–116.
Lundblad, B. (1954): Contributions to the geological history of the Hepaticae. Fossil Marchantiales from the Rhaetic-Liassic coal-mines of Skromberga (Prov. of Scania), Sweeden. – Svensk Botanisk Tidskrift 48(2): 381–417, pls I–IV.
Seward, A. C. (1895): Catalogue of the Mesozoic Plants in the Department of Geology, British Museum (Natural History). The Wealden Flora. Part II. – Gymnospermæ. Trustees of the British Museum (Natural History), London: 259 pp.
Lesquereux, C. L. (1878): Contributions to the fossil flora of the western Territories. Part II. The Tertiary flora. – Report of the United States Geological Survey of the Territories 7: 1–366, 65 pls.