• [Wiki] http://en.wikipedia.org/wiki/Garrulus_glandarius.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Garrulus_glandarius.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=D8D10F2C5A9AA49F&sec=lifehistory.
• [Keve1985] Keve, A. (1985). Der Eichelhäher, volume 410 of Die Neue Brehm-Bücherei. A. Ziemsen Verlag, Wittenberg Lutherstadt.
• [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.