SWENSON, J. E. Evaluation of a density index for territorial male Hazel Grouse Bonasa bonasia in spring and autumn. Ornis Fennica, [S. l.], v. 68, n. 2, p. 57–65, 1991. Disponível em: https://ornisfennica.journal.fi/article/view/133315. Acesso em: 25 nov. 2024.