• [AnAge] http://genomics.senescence.info/species/entry.php?species=Strix_uralensis.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=E162AEB825EEBCE3&sec=lifehistory.
• [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.
• [Sche1980] Scherzinger, W. (1980). Zur Ethologie der Fortpflanzung un Jugenentwicklung de Habichtgskauzes (Strix uralensis) met vergleichem zum Waldkauz (Strix Aluco), volume 15.