@inbook {310431, title = {Natural and synthetic diets of Malayan gibbons}, booktitle = {Primate biology and conservation }, year = {1986}, pages = {39-56}, publisher = {Cambridge University Press}, organization = {Cambridge University Press}, address = {Cambridge, UK}, author = {Chivers, D. J. and Raemakers, J. J. and Else, J. G. and Lee, P. C.} }