Hakala, A., K. Huhtala, A. Kaikusalo, E. Pulliainen, and S. Sulkava. “Diet of Finnish Snowy Owls Nyctea Scandiaca”. Ornis Fennica 83, no. 2 (July 1, 2006): 59–65. Accessed November 22, 2024. https://ornisfennica.journal.fi/article/view/133655.