1. H. Heuveling van Beek, D. Phillips, Agarwood: trade and CITES implementation in Southeast Asia, TRAFFIC report, 1999.
2. A. Barden, N. Awang Anak, T. Mulliken, M. Song, Heart of the matter: agarwood use and trade and CITES implementation for Aquilaria malaccensis, TRAFFIC report, 2000.
3. Population dynamics of some tropical trees that yield non-timber forest products;LaFrankie;Econ. Bot.,1994
4. K. Chakrabarty, A. Kumar, V. Menon, Trade in agarwood, TRAFFIC report, 1994.
5. Conservation and sustainable use of tropical trees in the genus Aquilaria. II. The impact of gaharu harvesting in Indonesia;Soehartono;Biol. Conserv.,2001