MacKenzie, Duncan T; Wise, Sherwood W (1983): Paleocene and Eocene calcareous nannofossils from Deep Sea Drilling Project Legs 25 and 40, South and East of Africa. In: Ludwig, WJ; Krasheninnikov, VA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 71, 1141-1170, doi:10.2973/dsdp.proc.71.147.1983