Nilsson, Leif. “Changes in Numbers and Distribution of Wintering Waterbirds at the South Coast of Scania, Sweden, During 55 Winters, 1964–2018”. Ornis Svecica 30 (May 25, 2020): 38–52. Accessed April 25, 2024. https://journals.lub.lu.se/os/article/view/19987.