ABDULLAH, N. I.; DHARMALINGAM, S. .; MD- ZAIN, B. M. . A Behavioral Study on the Bornean Orangutan (Pongo pygmaeus) in a Semi-wild Environment at Bukit Merah Orang Utan Island, Perak. Journal of Sustainable Natural Resources, [S. l.], v. 2, n. 2, p. 22–30, 2021. Disponível em: https://publisher.uthm.edu.my/ojs/index.php/jsunr/article/view/10206. Acesso em: 1 jul. 2022.