1990
“Land Use, Soil Loss, And Sustainable Agriculture In Rwanda”. Human Ecology 18 (2): 147-161. doi:10.1007/BF00889179.
. 1990. 1994
“Differentiating The Nature Of Agroforestry Systems And Agroforestry Knowledge Among Farmers In Southern Rwanda: Participatory And Formal Approaches As Complementary Methods”. Culture & Agriculture 15 (50): 5-11. doi:10.1525/cuag.1994.15.50.5. https://doi.org/10.1525/cuag.1994.15.50.5.
. 1994. “Farmer Knowledge And Experimentation With Trees And Tree Cultivation In Agroforestry Systems In Rwanda”. East Lansing, MI: Michigan State University, Department of Forestry. http://www.worldcat.org/oclc/33975106.
. 1994.