@ARTICLE {MANYONG:1995, title = {Sustainability of African smallholder farming systems: case study of highland areas of Central Africa}, author = {Manyong, A. M. and Degand, J. }, journal = {Journal of Sustainable Agriculture}, year = {1995}, volume = {6}, number = {4}, pages = {17--42}, issn = {1044-0046}, note = {Published online 21 Oct 2010}, url = {https://doi.org/10.1300/J064v06n04_04}, doi = {10.1300/j064v06n04_04}, }