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Kvaček, Z. (1995): Limnobiophyllum Krassilov – a fossil link between the Araceae and the Lemnaceae. – Aquatic Botany 50: 49–61.

Friis, E. M., Eklund, H., Pedersen, K. R. & Crane, P. R. (1994): Virginianthus calycanthoides gen. et sp. nov. – A calycanthaceous flower from the Potomac Group (Early Cretaceous) of eastern North America. – International Journal of Plant Sciences 155(6): 772–785.

McIver, E. E. & Basinger, J. F. (1993): Flora of the Ravenscrag Formation (Paleocene), southwestern Saskatchewan, Canada. – Palaentographica Canadiana 10: 1–167.

Kirchner, M. & Müller, A. (1992): Umkomasia franconica n. sp. und Pteruchus septentrionalis n. sp., Fruktifikationen von Thinnfeldia Ettingshausen. – Palaeontographica, Abt. B 224(1–3): 63–73 + 4 pls.

Geng, B. Y. (1992): Studies on Early Devonian flora of Sichuan. – Acta Phytotaxonomica Sinica 30: 197–211.

Endress, P. K. & Friis, E. M. (1991): Archamamelis, hamamelidalean flowers from the Upper Cretaceous of Sweden. – Plant Systematics and Evolution 175(1–2): 101–114.

Drinnan, A. N., Crane, P. R., Friis, E. M. & Pedersen, K. R. (1990): Lauraceous flowers from the Potomac Group (mid-Cretaceous) of eastern North America. – Botanical Gazette 151(3): 370–384.

Friis, E. M. (1990): Silvianthemum suecicum gen. et sp. nov., a new saxifragalean flower from the Late Cretaceous of Sweden. – Biologiske Skrifter 36: 1–35.

Upchurch Jr., G. R. & 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.

Cevallos-Ferriz, S. R. S. & Stockey, R. A. (1989): Permineralized fruits and seeds from the Princeton Chert (Middle Eocene) of British Columbia: Nymphaeaceae. – Botanical Gazette 150(2): 207–217.

Pedersen, K. R., Crane, P. R. & Friis, E. M. (1989): Pollen organs and seeds with Eucommiidites pollen. – Grana 28: 279–294.

Anderson, J. M. & Anderson, H. M. (1989): Palaeoflora of Southern Africa. Molteno Formation (Triassic). Vol. 2. Gymnosperms (excluding Dicroidium). A. A. Balkema, Rotterdam, Brookfield: 567pp.

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.

Brousmiche, C. (1986): Précisions sur les spores produites par quelques fougères sphénoptéridiennes appartennant aux genres Boweria Kidston, Crossotheca Zeiller, Discopteris Stur, Myriotheca Zeiller et Urnatopteris Kidston.Revue de Paléobiologie 5(2): 231–248.

Bande, M. B., Mehrotra, R. C. & Prakash, U. (1986): Occurrence of Australian element in the Deccan Intertrappean flora of India. – The Palaeobotanist 35(1): 1–12.

Friis, E. M. (1985): Actinocalyx gen. nov., sympetalous angiosperm flowers from the Upper Cretaceous of southern Sweden. – Review of Palaeobotany and Palynology 45(3–4): 171–183.

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.

Brousmiche, C. (1983): Les Fougères sphénoptéridiennes du Bassin Houiller Sarro-Lorrain (Systematic – Stratigraphie) (2 vols). – Publication, Societé gélogique du Nord 10: 1–480 + 100 pls.

Takahashi, K. & Shimono, H. (1982): Maestrichtian Micro flora of the Miyadani-gawa Formation in the Hida District, Central Japan. – Bulletin of the Faculty of Liberal Arts, Nagasaki University, Natural Science 22(2): 11–188.

Friis, E. M. & Skarby, A. (1982): Scandianthus gen. nov., Angiosperm Flowers of Saxifragalean Affinity from the Upper Cretaceous of Southern Sweden. – Annals of Botany 50(5): 569–583.