• [Wiki] http://en.wikipedia.org/wiki/Apus_pallidus.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=332BC664DFABB965&sec=lifehistory.
• [CuccMala1996] Cucco, M. and Malacarne, G. (1996). Effect of food availability on nestling growth and fledging success in manipulated pallid swift broods. Journal of Zoology, 240(1):141–151. doi:10.1111/j.1469-7998.1996.tb05491.x.
• [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.