@ARTICLE {NDUBUISI:1998,
title = {Crop–livestock integration along the gradient of resource-use intensification in the northern Guinea savanna of Nigeria},
author = {Ndubuisi, A. and Zeddies, J. and Manyong, V. and Smith, J. },
journal = {Quarterly Journal of International Agriculture},
year = {1998},
volume = {37},
pages = {105--115},
}