Hake, M., T. Dahlgren, M. Åhlund, P. Lindberg, and M. O. G. Eriksson. “The Impact of Water Level Fluctuation on the Breeding Success of the Black-Throated Diver Gavia Arctica in South-West Sweden”. Ornis Fennica, vol. 82, no. 1, Mar. 2005, pp. 1–12, https://ornisfennica.journal.fi/article/view/133626.