Kampe-Persson, H., Bildström, L., & Bildström, M. (2005). Can nesting competition with Whooper Swan Cygnus cygnus cause a decline of the Swedish Taiga Goose Anser fabalis fabalis population?. Ornis Svecica, 15(2), 119–121. https://doi.org/10.34080/os.v15.22746