@ARTICLE {SINGH:2003, title = {Recent progress on cowpea improvement}, author = {Singh, B. and Hartmann, P. and Fatokun, C. and Tamo, M. and Tarawali, S. and Ortiz, R. }, journal = {Chronica Horticulturae}, year = {2003}, volume = {43}, number = {2}, pages = {8--12}, }