1. Albrecht, H. &S. C. Dunnett, 1971. Chimpanzees in western Africa. In:Studies in Ethnology W. Wickler (ed.), Piper, Munchen.
2. Azuma, S., 1966. Ecological study of wild chimpanzees in Tanganyika.Abs. Proc. Jnt. Meet. Anthrop. Soc. Nippon & Jap. Soc. Ethnol. 19: 34.
3. ——, 1961–62. Progress report of the survey on chimpanzees in their natural habitat, Kabogo Point area, Tanganyika.Primates 3: 61–70.
4. —— & ——, 1965. Chimpanzees in Kabogo Point area, Tanganyika. In:Monkeys and Apes S. Kawamura &J. Itani (eds.), Chuokoron, Tokyo.
5. Baldwin, L., in prep. Social relationships among adult female chimpanzees in Gombe National Park, Tanzania (project description). University of Georgia.