Prestrud, P., Black, J. M. and Owen, M. (1989) “The relationship between an increasing Barnacle Goose Branta leucopsis population and the number and size of colonies in Svalbard”, Wildfowl, pp. 32–38. Available at: https://tidsskrift.dk/Wildfowl/article/view/154021 (Accessed: 17 December 2025).