Cao, L., Batbayar, N., Goroshko, O. A., Choi, C.-Y., Lee, H.
& Fox, A. D. (2018).
F1 Swan Goose Anser cygnoides. I A. D. Fox & J. O. Leafloor (red.),
A Global Audit of the Status and Trends of Arctic and Northern Hemisphere Goose Populations (Component 2: Population accounts) (s. 65-67). CAFF, Conservation of Arctic Flora and Fauna.