WILKINS, Khristi A; MALECKI, Richard A; SULLIVAN, Patrick J; FULLER, Joseph C; DUNN, John P; HINDMAN, Larry J; COSTANZO, Gary R; LUSZCZ, Dennis. Migration routes and Bird Conservation Regions used by Eastern Population Tundra Swans Cygnus columbianus columbianus in North America. Wildfowl, [S. l.], p. 20–37, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153543. Acesso em: 16 dec. 2025.