Österblom, Henrik, and Olof Olsson. “Changes in Feeding Behaviour and Reproductive Success in the Common Guillemot Uria Aalge on the Island of Stora Karlsö”. Ornis Svecica 12, no. 1–2 (April 1, 2002): 53–62. Accessed February 25, 2024. https://journals.lub.lu.se/os/article/view/22836.