Rahim, H. A., R. Ruben, and E. C. van Ierland. (2005). In Brooks, K. N., and P.F. Ffolliot, 2005. (eds.) Moving agroforestry into the mainstream. The 9th North American Agroforestry Conference Proceedings, June 12-15. St. Paul, Minnesota. Dept. of Forest Resources, University of Minnesota, MN.
Adoption and Abandonment of gum arabic agroforestry in Sudan