[1]
M. O. G. Eriksson, T. Dahlgren, A. Holmer, P. Lindberg, and M. Åhlund, “Breeding success of the Black-throated Diver Gavia arctica inside and outside bird sanctuaries in Lakes Fegen and Sottern”, Ornis Svec, vol. 15, no. 4, pp. 212–219, Oct. 2005.