• [Wiki] http://en.wikipedia.org/wiki/Cyanistes_caeruleus.
• [EoL] http://eol.org/pages/1051997/overview.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Cyanistes_caeruleus.
• [avibase]
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [MainDick2012] Mainwaring, M. C., Dickens, M., and Hartley, I. R. (2012). Sexual dimorphism and offspring growth: smaller female blue tit nestlings develop relatively larger gapes. J. Ornithol., 153:1011--1016.
• [NordNils2011] Nord, A. and Nilsson, J.-A. (2011). Incubation temperature affects growth and energy metabolism in blue tit nestlings. the American Naturalist, 178(5):639--651.
• [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.