• [Wiki] http://en.wikipedia.org/wiki/Branta_leucopsis.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Branta_leucopsis.
• [EoL] http://eol.org/pages/1048436/details.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=3163ED86A508BB83&sec=lifehistory.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [LoonOost1997] Loonen, M. U. E., Oosterbeek, K., and Drent, R. H. (1997). Variation in growth of young and adult size in barnacle geese Branta leucopsis: Evidence for density dependence. Ardea, 85:177--192.
• [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.