Järvinen, A., and L. Järvinen. “Constancy of Breeding Performance of the Pied Flycather Ficedula Hypoleuca in Different Habitats and Nest-Boxes in Finnish Lapland”. Ornis Fennica 59, no. 2–3 (September 30, 1982): 151–153. Accessed November 23, 2024. https://ornisfennica.journal.fi/article/view/133105.