Solonen, Tapio, and Martti Hildén. “Breeding Phenology in Great and Blue Tits (Parus spp.): Are Urban Populations More Resistant to Climate Change Than Rural Ones?”. Ornis Fennica 91, no. 4 (December 31, 2014): 209–219. Accessed November 21, 2024. https://ornisfennica.journal.fi/article/view/133858.