KOWALLIK, Christine; KOFFIJBERG, Kees. Does every goose count? Pitfalls of surveying breeding geese in urban areas. Wildfowl, [S. l.], p. 90–104, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153596. Acesso em: 16 dec. 2025.