Berger, W. H.; Lange, C. B.; Perez, M. E. (2002): The early Matuyama diatom maximum off SW Africa; a conceptual model. Elsevier, Amsterdam, Netherlands, In: Christensen, Beth A. (editor), Giraudeau, Jacques (editor), Neogene and Quaternary evolution of the Benguela coastal upwelling system, 180 (1-4), 105-116, georefid:2002-026686