1. Alton, C. and H. Rattanavong. 2004. Service Delivery and Resettlement: Options for Development Planning. Final Report Livelihoods Study, Lao/03/A0. UNDP/ECHO, Vientiane, Lao PDR.
2. Angelsen, A. and S. Wunder. 2003. Exploring the Forest Poverty Link: Key Concepts, Issues and Research Implications. CIFOR Occasional Paper No. 40, Bogor, Indonesia.
3. Barden, A., N. A. Anak, T. Mulliken, and M. Song. 2000. Heart of the Matter: Agarwood Use and Trade and CITES Implementation for Aquilaria malaccensis. TRAFFIC, Cambridge, U.K.
4. Belcher, B. and K. Schreckenberg. 2007. Commercialisation of Non-timber Forest Products: A Reality Check. Development Policy Review 25:355–377.
5. ———, M. Ruiz-Perez, and R. Achdiawan. 2005. Global Patterns and Trends in the Use and Management of Commercial NTFPs: Implications for Livelihoods and Conservation. World Development 33:1435–1452.