Rajnish P. Vandercone; Chameera Dinadh; Gayan Wijethunga; Kitsiri Ranawana; David T. Rasmussen (2012). "Dietary Diversity and Food Selection in Hanuman Langurs (Semnopithecus entellus) and Purple-Faced Langurs (Trachypithecus vetulus) in the Kaludiyapokuna Forest Reserve in the Dry Zone of Sri Lanka". International Journal of Primatology. 33 (6): 1382–1405. doi:10.1007/s10764-012-9629-9. S2CID14444114.
Wilson, Don E.; Mittermeier, Russell A.; Rylands, Anthony B. (2012). "Introduction". Handbook of the Mammals of the World, Volume 3: Primates (1st ed.). Lynx Edicions. ISBN978-84-96553-89-7. Retrieved 2018-08-30.
Rajnish P. Vandercone; Chameera Dinadh; Gayan Wijethunga; Kitsiri Ranawana; David T. Rasmussen (2012). "Dietary Diversity and Food Selection in Hanuman Langurs (Semnopithecus entellus) and Purple-Faced Langurs (Trachypithecus vetulus) in the Kaludiyapokuna Forest Reserve in the Dry Zone of Sri Lanka". International Journal of Primatology. 33 (6): 1382–1405. doi:10.1007/s10764-012-9629-9. S2CID14444114.
unhabitat.lk
Post-Disaster Housing Coordination Project (August 2007). "Introduction"(PDF). UN-HABITAT: United Nations Human Settlements Programme – Sri Lanka District Housing Profile (Colombo District). UNICEF. p. 3. Archived from the original(PDF) on 21 February 2016. Retrieved 28 April 2012.
Post-Disaster Housing Coordination Project (August 2007). "Introduction"(PDF). UN-HABITAT: United Nations Human Settlements Programme – Sri Lanka District Housing Profile (Colombo District). UNICEF. p. 3. Archived from the original(PDF) on 21 February 2016. Retrieved 28 April 2012.