References:
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Hildebrand-Habel, T., Willems, H. & Versteegh, G. J. M. (1999). Variations in calcareous dinoflagellate associations from the Maastrichtian to Middle Eocene of the western South Atlantic Ocean (São Paulo Plateau, DSDP Leg 39, Site 356). Review of Palaeobotany and Palynology. 106: 57-87. gs
Zonneveld, K. A. F., Meier, K. J. S., Esper, O., Siggelkow, D., Wendler, I. & Willems, H. (2005). The (palaeo-) environmental significance of modern calcareous dinoflagellate cysts: a review. Paläontologische Zeitschrift. 79(1): 61-77. gs
