Pearce, J. M., Esler, D. and Degtyarev, A. G. (1998) “Nesting ecology of Spectacled Eiders Somateria fischeri on the Indigirka River Delta, Russia”, Wildfowl, 49, pp. 110–123. Available at: https://tidsskrift.dk/Wildfowl/article/view/154611 (Accessed: 4 April 2026).