Roonwal, M. L., and S. C. Makwana. “Tail Carriage in the Hanuman Langur, <i>Presbytis Entellus entellus< I> (Primates, Cercopithecidae) in the Indian Desert”. Records of the Zoological Survey of India, vol. 78, no. 1-4, Dec. 1981, pp. 78-100, doi:10.26515/rzsi/v78/i1-4/1981/161778.