Veistola, Simo, Tapio Eeva, and Esa Lehikoinen. “Seasonal Occurrence of Arthropods As a Source of Food for Birds in Finnish Lapland”. Entomologica Fennica 6, no. 2-3 (September 1, 1995): 177–181. Accessed November 25, 2024. https://journal.fi/entomolfennica/article/view/83855.