• [Wiki] http://en.wikipedia.org/wiki/Necrosyrtes_monachus.
• [arkive] https://www.arkive.org/white-backed-vulture/necrosyrtes-monachus/.
• [EoL] http://eol.org/pages/1048942/details.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [MundCook1975] Mundy, P. J. and Cook, A. W. (1975). Hatching and rearing of two chicks by the hooded vulture. Ostrich, 46:45--50. doi:10.1080/00306525.1975.9639381.
• [PrinPres1991] Prinzinger, R., A.Preßmar, and Schleucher, E. (1991). Body temperature in birds. Comp. Biochem. Physiol., 99A(4):499--506. doi:10.1016/0300-9629(91)90122-S.