@ARTICLE {MANYONG:2006, title = {Effective dimensionality and factors affecting crop-livestock integration in West African savannas: a combination of principal component analysis and tobit approaches}, author = {Manyong, V. and Okike, I. and Williams, T. }, journal = {Agricultural Economics}, year = {2006}, volume = {35}, number = {2}, pages = {145--155}, issn = {0165-1587}, }