Hien, E. -, W. T. - Kabore, D. - Masse, and P. Dugue. 2010. “Sustainable Farming Systems in the Sub-Sahelian Zone of Burkina Faso -: Key Factors”. Sustainability in Debate 1 (2):125. https://doi.org/10.18472/SustDeb.v1n2.2010.1686.