GUNN, A. Voles, lemmings and caribou - population cycles revisited?. Rangifer, [S. l.], v. 23, n. 5, p. 105–111, 2003. DOI: 10.7557/2.23.5.1689. Disponível em: https://septentrio.uit.no/index.php/rangifer/article/view/1689. Acesso em: 18 sep. 2021.