- [Wiki]
http://en.wikipedia.org/wiki/Psittacula_krameri.
- [AnAge]
http://genomics.senescence.info/species/entry.php?species=Psittacula_krameri.
- [avibase]
https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=6B1CFC3CFA400D78&sec=lifehistory.
- [BrauWink2013]
Braun, M. P. and Wink, M. (2013).
Nestling development of ring-necked parakeets (Psittacula
krameri) in a nest box population.
The Open Ornithology Journal, 6:9--24. doi:10.2174/187445320130601000.
- [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.