• [Wiki] http://en.wikipedia.org/wiki/Psittacula_eupatria.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Psittacula_eupatria.
• [ADW] https://animaldiversity.org/accounts/Psittacula_eupatria/.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=1021FA920B6915F9&sec=lifehistory.
• [KainWin2019] Khaing, T. T., Win, S., and Shwe, C. S. (2019). Growth and feather development of Alexandrine parakeets, Psittacula eupatria (Linnaeus, 1766), in captive condition. International Journal of Innovative Science and Research Technology, 4(7):1064--1067.
• [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.