Dahlén, Börje, and Mats O. G. Eriksson. “Does the Breeding Performance Differ Between Solitary and Colonial Breeding Red-Throated Loons Gavia Stellata in the Core Area of the Swedish Population?”. Ornis Svecica, vol. 26, no. 3–4, Oct. 2016, pp. 135–148, doi:10.34080/os.v26.22509.