Lötberg, Ulrik, Natalie Isaksson, Lennart Söderlund, and Susanne Åkesson. “Conservation Measures for the Caspian Tern Hydroprogne Caspia at the Largest Colony in Sweden”. Ornis Svecica 32 (June 9, 2022): 26–37. Accessed August 15, 2022. https://journals.lub.lu.se/os/article/view/22569.