SCHULMAN, Andrea B.; WHITE, Robert G. Nursing behaviour as a predictor of alternate-year reproduction in muskoxen. Rangifer, Tromsø, Norway, v. 17, n. 1, p. 31–35, 1997. DOI: 10.7557/2.17.1.383. Disponível em: https://septentrio.uit.no/index.php/rangifer/article/view/383. Acesso em: 16 jun. 2026.