Fox, A. D. & Nuttall, M. (Ed.) (2005). Divers or Loons. In M. Nuttall (Ed.), Encyclopedia of the Arctic, Volume 1: A-F Index (pp. 497-499). Frank Cass Publishers.
Fox, A. D. & Nuttall, M. (Ed.) (2005). Eider. In M. Nuttall (Ed.), Encyclopedia of the Arctic, Volume 1: A-F Index (pp. 547-549). Frank Cass Publishers.