Riegraf, W. (1989): Benthonische Schelf-Foraminiferen aus dem Valanginium-Hauterivium (Unterkreide) des Indischen Ozeans suedwestlich Madagaskar (Deep Sea Drilling Project Leg 25, Site 249) Benthic shelf foraminifers of the Valanginian through the Hauterivian, Lower Cretaceous, of the Indian Ocean, southwestern Madagascar, DSDP Site 249, Leg 25. Springer International, Berlin, Federal Republic of Germany, Geologische Rundschau, 78 (3), 1047-1061, georefid:1992-061638