Elgmork, Kåre. “Dynamics of Garden Birds at a Feeding Station in a Suburban Area Near Oslo, Norway, 2000–2008”. Ornis Svecica 21, no. 2–4 (April 1, 2011): 179–189. Accessed December 4, 2024. https://journals.lub.lu.se/os/article/view/22605.