RAZAL, C.; MILLER, L. The effect of different types of environmental enrichment on Humboldt penguin Spheniscus humboldti behaviour. Journal of Zoo and Aquarium Research, [S. l.], v. 9, n. 4, p. 281–286, 2021. DOI: 10.19227/jzar.v9i4.411. Disponível em: https://jzar.org/jzar/article/view/411. Acesso em: 8 dec. 2021.