1. Calvert, J. (1985).Food Selection by Western Gorillas in Relation to Food Chemistry and Selective Logging in Cameroon, West Africa, University Microfilms International, Ann Arbor, Mich.
2. Carroll, R. (1986). Status of the lowland gorilla and other wildlife in the Dzanga-Sangha region of southwestern Central African Republic.Primate Conserv. 7: 38–41.
3. Carroll, R. (1988). Relative density, range extension, and conservation potential of the lowland gorilla (Gorilla gorilla gorilla) in the Dzanga-Sangha region of southwestern Central African Republic.Mammalia 52: 309–323.
4. Casimir, M. (1975). Feeding ecology and nutrition of an eastern gorilla group in the Mt. Kahuzi region.Folia Primatol. 24: 81–136.
5. Coolidge, H. (1936). Zoological results of the George Vanderbilt African Expedition of 1934. Part IV. Notes on four gorillas from the Sanga River region.Proc. Acad. Nat. Sci. Philad. 88: 479–501.