Bengtsson K, Blomquist L. Origin, migration, and site fidelity of Black-headed Gulls Larus ridibundus ringed at Malmö. Ornis Svec [Internet]. 2001 Apr. 1 [cited 2024 Nov. 24];11(1–2):59-77. Available from: https://journals.lub.lu.se/os/article/view/22860