Beal, M., P. Byholm, U. Lötberg, T. J. Evans, K. Shiomi, and S. Åkesson. “Habitat Selection and Foraging Site Fidelity in Caspian Terns (Hydroprogne Caspia) Breeding in the Baltic Sea”. Ornis Fennica, vol. 98, no. 4, Jan. 2022, pp. 128-41, doi:10.51812/of.113445.