MAGNUSSON, A. Blue Tit Parus caeruleus and Pied Flycatcher Ficedula hypoleuca breeding simultaneously in a nest-box. Ornis Fennica, [S. l.], v. 66, n. 4, p. 167–168, 1989. Disponível em: https://ornisfennica.journal.fi/article/view/133293. Acesso em: 22 nov. 2024.