NiningsihL., AlikodraH. S., AtmokoS. S. U., and MulyaniY. A. “Characteristic of Orangutan Habitat in Coal Mining Rehabilition Area in East Kalimantan, Indonesia”. Jurnal Manajemen Hutan Tropika, Vol. 23, no. 1, Apr. 2017, pp. 37-49, https://jai.ipb.ac.id/index.php/jmht/article/view/16709.