Wei, Wuchang; Wise, Sherwood W., Jr. (1989): Paleogene calcareous nannofossil magnetobiochronology; results from South Atlantic DSDP Site 516. Elsevier, Amsterdam, Netherlands, In: Haq, B. U. (editor), Special issue; Plankton biochronology, marine micropaleontology, 14 (1-3), 119-152, georefid:1989-049738