1. Ich lebe mit den Schimpansen am Viktoriasee;Kade;Das Tier,1967
2. Carter J. 1981. Journey to freedom. Smithsonian, April, 90–100.
3. Brewer S. and Carter J. 1983. Funding proposal for the chimpanzee rehabilitation projects in Gambia West Africa. mimeo.
4. Brewer S. 1977/79. The rehabilitation of captive-reared chimpanzees into the wild in West Africa, mimeo.