1. Contribution of local trade in Ziziphus spina-christi L. fruits to rural household’s economy in Rashad locality, Sudan;Adam;Forestry Ideas,2010
2. Forest products, livelihoods and conservations: case studies of non-timber forest product systems;Alexiades,2004
3. Socio-economic Benefits and Issues in Non-wood Forest Products Use. Appendix 4.1.1. Non-wood Forest Products for Rural Income and Sustainable Forestry;Arnold,2002
4. Can non-timber forest products match tropical forest conservation and development objectives?;Arnold;Ecol. Econ.,2001
5. Wood resources and their use in the Nuba mountains;Babiker,1985