JÄRVINEN, O.; VÄSÄINEN, R. A.; ENEMAR, A. Efficiency of the line transect method in mountain birch forest. Ornis Fennica, [S. l.], v. 55, n. 1, p. 16–23, 1978. Disponível em: https://ornisfennica.journal.fi/article/view/132956. Acesso em: 23 nov. 2024.