@INPROCEEDINGS {OLUFAJO:2002, title = {Advances in cowpea cropping systems research}, author = {Olufajo, O. * and Singh, B. }, booktitle = {Challenges and opportunities for enhancing sustainable cowpea production: proceedings of the World Cowpea Conference III held at the International Institute of Tropical Agriculture (IITA), 4-8 September 2000}, year = {2002}, pages = {267--277}, location = {Ibadan, Nigeria}, note = {Proceedings of the World Cowpea Conference III held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 4-8 September 2000}, }