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2. The Cenomanian–Coniacian of the Sergipe Basin, Brazil;Bengtson;Fossils and Strata,1983
3. Bengtson, P., Berthou, P.-Y. 1983. Microfossiles et Echinodermes incertae sedis des dépôts albiens à coniaciens du bassin de Sergipe-Alagoas, Brésil. Cahiers de Micropaléontologie 1982(3), 13–22 [for 1982].
4. Ammonite and foraminiferal dating of the first marine connection between the central and South Atlantic;Bengtson,1992
5. Stratigraphic correlation by microfacies of the Cenomanian-Coniacian of the Sergipe Basin, Brazil;Berthou;Fossils and Strata,1988