ABDULLAH, Nur Izzati; DHARMALINGAM, Sabapathy; MD- ZAIN, Badrul Munir. 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://journal.uthm.edu.my/index.php/jsunr/article/view/10206. Acesso em: 14 aug. 2026.