David Pimentel, Ph.D., Biological Invasions : Economic and Environmental Costs of Alien Plant, Animal, and Microbe Species, CRC Press, , 384 p. (ISBN978-1-4200-4166-8, lire en ligne), p. 93
Norman Maclean, A Less Green and Pleasant Land : Our Threatened Wildlife, Cambridge University Press, (ISBN978-1-316-06227-2, lire en ligne), p. 129