1. Appanah, S. & Mohd. Rasol Abd. Manaf(1990) Small trees can fruit in logged dipterocarp forests. J. Trop. For. Sci. 3: 80–87.
2. Banks, E.(1931) A popular account of the mammals of Borneo. J. Malay. Br. R. Asiatic Soc. 9(2): 1–139.
3. Becker, P., Leighton, M. & Payne, J. B.(1985) Why tropical squirrels carry seeds out of source crowns? J. Trop. Ecol. 1: 183–186.
4. Caldecott, J. O.(1986) An ecological and behavioural study of the pig-tailed macaque. Contrib.P-1 21.1–259
5. Corbet, G B. & Hill, J. E.(1992) The mammals of the Indomalayan region: a systematic review. Oxford University Press, New York.