Ydenberg, R. C., Prins, H. H. T. and van Dijk, J. (1984) “A lunar rhythm in the nocturnal foraging activities of wintering Barnacle Geese”, Wildfowl, 35, pp. 93–96. Available at: https://tidsskrift.dk/Wildfowl/article/view/155047 (Accessed: 17 December 2025).