1. Amr, H., & Richiedei, S. (2000). Sahel NGO population network case study. Washington, DC: Policy Project USAID.
2. Bai, Z. G. & Dent, D. L. (2006). Global assessment of land degradation and improvement: pilot study in Kenya. Report 2006/01. Wageningen: ISRIC—World Soil Information.
3. Bai, Z., & Dent, D. (2008). Land degradation and improvement in Argentina. 1. Identification by remote sensing (p. 149). Wageningen, The Netherlands: International Soil Reference Information Center—World Soil Information.
4. Bai, Z. G., Dent, D.L., Olsson, L., & Schaepman, M. E. (2008). Global assessment of land degradation and improvement 1: Identification by remote sensing. Report 2008/01. Rome/Wageningen: FAO/ISRIC.
5. Baker, T. J., & Miller, S. N. (2013). Using the soil and water assessment tool (SWAT) to assess land use impact on water resources in an East African watershed. Journal of Hydrology, 486, 100–111.