1. Aa, P.J.B.C., Robidé van der, 1884. Korte aantekeningen over de zoogdieren van Borneo. In: Bock, C., Reis in Oost- en Zuid-Borneo. M. Nijhoff, 's Gravenhage, pp. 105–112 (in Dutch).
2. Alikodra, H.S., Mustari, A.H., Yasuma, S., 1992. Studi ekologi dan konservasi Bekantan (N. larvatus Wurmb) di delta Mahakam, Kalimantan Timur: habitat dan populasi. Laporan Akhir Proyek Peningkatan Penguruan Tinggi Universitas Mulawarman. Japan International Cooperation Agency and Maluwarman University, Samarinda (in Indonesian).
3. Anonymous, 1999. Bekantan masih ada. Kompas 5 February 1999 (in Indonesian).
4. Azuma, S., Suzuki, A., 1984. The distribution of primates in Sebulu and R. Mahakam. Kyoto University Overseas Research Report of Studies on Asian Non-human Primates 3, 45–54.
5. Banks, E., 1931. A popular account of the mammals of Borneo. Journal of the Malayan Branch of the Royal Asiatic Society, pp. 1–120+ apps.