1. Bibliotheca Primatologica;S. A. Altmann,1970
2. Carpenter, C. R., 1934. A field study of the behavior and social relations of howling monkeys (Alouatta palliata).Comp. Psychol. Monogr., 10(48): 1–132.
3. ————, 1940. A field study of Siam of the behavior and social relations of the gibbon,Hylobates lar.Comp. Psychol. Monogr., 16(5): 1–212.
4. Crook, J. H., 1966. Baboon herd structure and movement, a comparative report.Symp. zool. Soc. Lond., 18: 237–258.
5. Ellefson, J. O., 1968. Territorial behavior in the common white handed gibbon (Hylobates lar Linn). In:Primates,Jay (ed.), Holt, Reinhart, & Winston, New York, pp. 180–199.