OJANEN, M.; ORELL, M. Method for determining the incubation stage of Pied Flycathcher Ficedula hypoleuca eggs. Ornis Fennica, [S. l.], v. 55, n. 1, p. 29–31, 1978. Disponível em: https://ornisfennica.journal.fi/article/view/132958. Acesso em: 23 nov. 2024.