1. Almquist, A. J., 1974. Sexual difference in the anterios dentition in African primates.Am. J. Phys. Anthrop., 40: 359–368.
2. Altmann, S. A., 1962. A field study of the sociobiology of rhesus monkeys,Macaca mulatta.Ann. N. Y. Acad. Sci., 102: 338–435.
3. ———— &J. Altmann, 1970. Baboon ecology.Bibl. Primat., 12: 1–220, Karger, Basel.
4. Carpenter, C. R., 1934. A field study of the behaviour and social relations of howling monkeys.Comp. Psychol. Monogr., 10: 1–168.
5. Chance, M. R. A. &C. J. Jolly, 1970.Social Groups of Monkeys, Apes and Men. Thames & Hudson, London.