Todd,R. and Low,D. (1964): Cenomanian (Cretaceous) Foraminifera from the Puerto Rico Trench . Deep-Sea Research Vol. 11 p. 395–414
Wonders,A.A.H. (1975): Cretaceous planktonic foraminifera of the Planomalina buxtorfi group from El Burrueco, southern Spain . Koninklijke Nederlandse Akademie van Wetenschappen, Amsterdam, Proceedings, Series B Vol. 78 p. 83-93
Moullade,M.; Bellier,J.P. and Tronchetti,G. (2002): Hierarchy of criteria, evolutionary processes and taxonomic simplification in the classification of Lower Cretaceous planktonic foraminifera . Cretaceous Research Vol. 23 p. 111-148
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