@ARTICLE {CEBALLOS:2004, title = {Cassava breeding: opportunities and challenges}, author = {Ceballos, H. and Iglesias, C. and P{\'e}rez, J. and Dixon, A. }, journal = {Plant Molecular Biology}, year = {2004}, volume = {56}, pages = {503--516}, note = {RTB; Root and Tuber; Cassava}, }