Thingstad, Per, Olav Hogstad, and James D. M. Speed. “The Influence of Climatic Conditions in Breeding Grounds and Migratory Flyways on a Subalpine Norwegian Willow Warbler (Phylloscopus Trochilus) Population”. Ornis Fennica 92, no. 1 (March 31, 2015): 23–33. Accessed November 23, 2024. https://ornisfennica.journal.fi/article/view/133865.