Pulliainen, E. “Mid-Winter Feeding Activity of Siberian Tits Parus Cinctus and a Great Tit Parus Major at a Feeding Site North of the Arctic Circle”. Ornis Fennica 57, no. 2 (July 1, 1980): 90–92. Accessed November 26, 2024. https://ornisfennica.journal.fi/article/view/133040.