FOUQUET, Michel H.; SCHRICKE, Vincent; FOUQUE, Carol. Greylag Geese Anser anser depart earlier in spring: an analysis of goose migration from western France over the years 1980-2005. Wildfowl, [S. l.], p. 143–151, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153913. Acesso em: 16 dec. 2025.