• [Wiki] http://en.wikipedia.org/wiki/Otis_tarda.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=C6F33176724AC933&sec=lifehistory.
• [IldiPal1992] Ildikó, A. A. and Pál, A. (1992). Data on the growth of body mass of great bustard (Otis tarda) reared by hand. Aquila a Madartani Intezet Evkonyve, 99:85–91.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [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.