Tengholm, Anders, Johan Tengholm, and Robert Ekblom. “Winter Recovery in Sweden of a Dutch Blackcap Sylvia Atricapilla”. Ornis Svecica 28, no. 2–4 (October 1, 2018): 87–90. Accessed June 22, 2024. https://journals.lub.lu.se/os/article/view/19536.