Soininen , Eeva M., Christiane E. Hübner, and Ingibjörg S. Jónsdóttir. 2010. “Food Selection by Barnacle Geese (Branta Leucopsis) in an Arctic Pre-Breeding Area”. Polar Research 29 (3):404-12. https://doi.org/10.3402/polar.v29i3.6080.