website: 2000 IUCN Red List of Threatened Species; http://www.redlist.org/
website: Mammal Species of the World; http://nmnhgoph.si.edu/msw/
Wilson, Don E., and DeeAnn M. Reeder, eds. 2005-10-01. Mammal Species of the World: A Taxonomic and Geographic Reference, 3rd ed., vols. 1 & 2. Johns Hopkins University Press. Baltimore, Maryland, USA. 2142. 0-8018-8221-4. .
Wilson, Don E., and DeeAnn M. Reeder, eds. 1992-01-01. Mammal Species of the World: A Taxonomic and Geographic Reference, 2nd ed., 3rd printing. Smithsonian Institution Press. Washington, DC, USA. xviii + 1207. 1-56098-217-9. Corrections were made to text at 3rd printing.
Wilson, Don E., and F. Russell Cole 2000-01-01. Common Names of Mammals of the World. Smithsonian Institution Press. Washington, DC, USA. xiv + 204. 1-56098-383-3. With contributions by Bernadette N. Graham, Adam P. Potter, and Mariana M. Upmeyer.
Wilson & Reeder, eds. (2005): Status: CITES - Appendix I; U.S. ESA and IUCN - Endangered
Wilson & Reeder, eds. (2005): Comments: See Shoshani and Eisenberg (1982, Mammalian Species, 182), who identified three subspecies of the Asian elephant: E. m. sumatranus from the island of Sumatra, E. m. indicus from mainland Asia, and E. m. maximus from the island of Sri Lanka. See also Deraniyagala (1955). Colin Groves (pers. comm., 2002) suggested that based on small measurements and restricted ear depigmentation, the Malay elephant (hirsutus Lydekker 1914) and the Borneo elephant (borneensis Deraniyagala, 1950) should be syn...