Bo Beolens, Michael Watkins et Michael Grayson, Eponym Dictionary of Mammals, Johns Hopkins University Press, (ISBN978-0-8018-9304-9, lire en ligne), p. 24
(en) Frits Hesselink et Jan Čeřovský, Learning to Change the Future : A bird's-eye view of the history of the IUCN Commission on Education and Communication, IUCN, (lire en ligne)
(en) Frits Hesselink et Jan Čeřovský, Learning to Change the Future : A bird's-eye view of the history of the IUCN Commission on Education and Communication, IUCN, (lire en ligne)