@ARTICLE {OKIKE:2005,
title = {Ecological and socio-economic factors affecting agricultural intensification in the West African savannas: evidence from northern Nigeria},
author = {Okike, I. and Jabbar, M. and Manyong, V. and Smith, J. W. },
journal = {Journal of Sustainable Agriculture},
year = {2005},
volume = {27},
number = {2},
pages = {5--37},
issn = {1044-0046},
}