PULLIAINEN, E. Flocking of Capercailllie, Tetrao urogallus, in eastern Finnish Lapland in winter. Ornis Fennica, [S. l.], v. 63, n. 2, p. 56–57, 1986. Disponível em: https://ornisfennica.journal.fi/article/view/133208. Acesso em: 19 apr. 2025.