• [Wiki] http://en.wikipedia.org/wiki/Setophaga_citrina.
• [AnAge] https://genomics.senescence.info/species/entry.php?species=Setophaga_kirtlandii.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=B9A2B7CCE43D3D57&sec=lifehistory.
• [BoceDonn2020] Bocetti, C. I., Donner, D. M., and Mayfield, H. F. (2020). Kirtland's warbler (Setophaga kirtlandii), version 1.0. in birds of the world (a. f. poole, editor). cornell lab of ornithology, ithaca, ny, usa. doi:10.2173/bow.kirwar.01.
• [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.