Mahyana, Kanthi Arum Widayati, and Puji Rianti. “Activity Budget and Diet in Sumatran Orangutan (Pongo Abelii) at Soraya Research Station, Aceh”. HAYATI Journal of Biosciences 30, no. 4 (April 3, 2023): 653–661. Accessed December 24, 2025. https://journal.ipb.ac.id/hayati/article/view/42884.