Bolli,H.M.; Loeblich,A.R. and Tappan,H. (1957): The Planktonic foraminiferal families Hantkeninidae, Orbulinidae, Globorotaliidae, and Globotruncanidae . U.S. National Museum Bull. Vol. 215 p. 3-50
Eicher,D.L. and Worstell,P. (1970): Cenomanian and Turonian foraminifera from the Great Plains, United States . Micropaleontology Vol. 16 p. 269–324
Pflaumann,U. and Krasheninnikov,V.. (1977): Early Cretaceous planktonic foraminifers from eastern North Atlantic, DSDP Leg 41 . In: Initial Reports of the Deep Sea Drilling Project 41 , Abidjan, Ivory Coast, to Malaga, Spain, February-April 1975 Eds: Gardner, J..Herring, J.. p. 539-564
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