'<i>Aegypius monachus</i> (Linnaeus, 1766)'. Ruggiero M., Gordon D., Bailly N., Kirk P., Nicolson D. (2011). The Catalogue of Life Taxonomic Classification, Edition 2, Part A. In: Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist (Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D., eds). DVD; Species 2000: Reading, UK.URL:http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=175494. Accessed on 24th February, 2012.
'Aegypius monachus (Linnaeus, 1766)'. Ruggiero M., Gordon D., Bailly N., Kirk P., Nicolson D. (2011). The Catalogue of Life Taxonomic Classification, Edition 2, Part A. In: Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist (Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D., eds). DVD; Species 2000: Reading, UK.URL:http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=175494. Accessed on 24th February, 2012.
Encyclopedia of Life. Available fromhttp://www.eol.org. Accessed 15 Dec 2012.
Praveen J., Jayapal, R., & Pittie, A., 2016. Checklist of the birds of India (v1.1). Website:http://www.indianbirds.in/india/ [Date of publication: 03 October, 2016].
Praveen J., Jayapal, R., & Pittie, A., 2018. Checklist of the birds of India (v2.0). Website:http://www.indianbirds.in/india/ [Date of publication: 31 January, 2018].