Irwin, Darren E, and Magnus Hellström. “Green Warbler Phylloscopus (trochiloides) Nitidus Recorded at Ottenby, Öland: A First Record for Scandinavia”. Ornis Svecica 17, no. 2 (April 1, 2007): 75–80. Accessed May 30, 2024. https://journals.lub.lu.se/os/article/view/22689.