HELLE, P.; LINDSTRÖM, J. Censusing tetranoids by the Finnish wildlife triangle method: principles and some applications. Ornis Fennica, [S. l.], v. 68, n. 4, p. 148–157, 1991. Disponível em: https://ornisfennica.journal.fi/article/view/133328. Acesso em: 22 nov. 2024.