Madsen, J., Tucker, G. M. (Ed.), Heath, M. F. (Ed.), Tomialojc, L. (Ed.) & Grimmett, R. F. A. (Ed.) (1994). Brent Goose (Branta bernicla). In Birdlife Conservation Series (pp. 114-115). Birdlife International.
Fox, A. D. (2005). Brent Geese. In M. Nuttall (Ed.), Encyclopedia of the Arctic, Volume 1: A-F Index (pp. 276-277). Frank Cass Publishers.