HARTLEY, M. Assessing Risk Factors for Reproductive Failure and Associated Welfare Impacts in Elephants in European Zoos. Journal of Zoo and Aquarium Research, [S. l.], v. 4, n. 3, p. 127–138, 2016. DOI: 10.19227/jzar.v4i3.162. Disponível em: https://jzar.org/jzar/article/view/162. Acesso em: 19 jan. 2022.