Nyholm, N. E., and H. E. Mynhberg. “Breeding Area Fidelity of the Pied Flycatcher Ficedula Hypoleuca at Ammarnäs, Swedish Lapland”. Ornis Fennica 60, no. 1 (March 31, 1983): 22–27. Accessed November 23, 2024. https://ornisfennica.journal.fi/article/view/133119.