MARJA, R.; HERZON, I. The importance of drainage ditches for farmland birds in agricultural landscapes in the Baltic countries: does field type matter?. Ornis Fennica, [S. l.], v. 89, n. 3, p. 170–181, 2012. DOI: 10.51812/of.133804. Disponível em: https://ornisfennica.journal.fi/article/view/133804. Acesso em: 17 may. 2024.