1. Park outreach and gorilla conservation: Mgahinga Gorilla National Park, Uganda;Adams,2001
2. Ashley, C. (1998). Intangibles matter: non-financial dividends of community-based natural resource management. Unpublished report, WWF LIFE Programme, Windhoek, Namibia
3. Ashley, C., & LaFranchi, C. (1997). Livelihood strategies of rural households in Caprivi: implications for conservancies and natural resource management. Research Discussion Paper No. 20, Directorate of Environmental Affairs, Ministry of Environment and Tourism, Windhoek, Namibia
4. Community-based development in Africa;Barbier,1992
5. Barnes, J. I. (1994). Suggested criteria for shadow pricing in cost–benefit analysis of projects in Namibia: Unpublished paper. Directorate of Environmental Affairs, Ministry of Environment and Tourism, Windhoek, Namibia