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Baumann, K.H. 1990. Veränderlichkeit der Coccolithenflora des Europäischen Nordmeeres im Jungquartär. Berichte aus dem Sonderforschungsbereich 313, Universität Kiel, 22:1-146.

Berggren, W.A.D., Kent, D.V., Swisher, C.C., and Aubry, M.-P. 1995. A revised Cenozoic geochronology and chronostratigraphy, p. 129-212. In Berggren, W.A., Kent, D.V., Aubry, M.-P., and Hardenbol, J. (eds.), Geochronology, time scales and global stratigraphic correlation. SEPM Special Publication 54, Tulsa, Oklahoma.

Bukry, D. and Bramlette, M.N. 1969. Some new and stratigraphically useful calcareous nannofossils of the Cenozoic. Tulane Studies in Geology and Paleontology, 7:131-142.

Eldredge, and N., Gould, S.J. 1972. Punctuated equilibria: An alternative to phyletic gradualism, p. 82-115. In Schopf, T.J.M. (ed.), Models in Paleobiology. Freeman, Cooper and Company, San Francisco.

Janin, M.C. 1981. Essai de datation de quelques concrétions polymétalliques et évolution quarternaire du coccolithe Cyclococcolithus leptoporus-macintyrei. Bulletin de la Société Géologique de France, 7, tome XXIII(3): 287-296.

Knappertsbusch, M., Cortes, M.Y., and Thierstein, H.R. 1997. Morphologic variability of the coccolithophorid Calcidiscus leptoporus in the plankton, surface sediments and from the Early Pleistocene. Marine Micropaleontology, 30:293-317.

Knappertsbusch, M. 2000. Morphologic evolution of the coccolithophorid Calcidiscus leptoporus from the upper Oligocene to Recent. Journal of Paleontology, 74(3):712-730. For supplementary data.

Lyons, Patrick D. and Laurence Head 1998. QuickTime VR: A Powerful New Illustrative Tool for Micropaleontological Research. Palaeontologia Electronica, 1(2): 12p., 219 KB. 1998_2/lyons/issue2.htm