Unleashing the potential of sweetpotato in Sub-Saharan Africa: Current challenges and way forward - Andrade, M.I.; Barker, I.; Cole, Donald C.; Fuentes, S.; Grüneberg, W.J.; Kapinga, R.; Kroschel, Jürgen; Labarta, Ricardo Antonio; Lemaga, B.; Loechl, C.; Low, Jan W.; Ortíz, O.; et al. (International Potato Center, 2009)