Slattery, S. M., Samelius, G., Alisauskas, R. I., Danielson, J. R., & Moore, F. P. (1998). For whom the geese toll: aberrant or adaptive behaviour in Ross’ Chen rossii and Lesser Snow geese Chen caerulescens caerulescens?. Wildfowl, 242–244. Retrieved from https://tidsskrift.dk/Wildfowl/article/view/154598