SOLOVYEVA, Diana; VARTANYAN, Sergey. Aspects of the breeding biology of Bewick’s Swans Cygnus columbianus bewickii nesting in high densities in the Chaun River delta, Chukotka, east Russia. Wildfowl, [S. l.], p. 148–166, 2014. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153625. Acesso em: 13 feb. 2026.