M. Opoku-Agyeman, S. Bennett-Lartey, and C. Markwei, “Agro-morpho-logical and sensory characterization of cocoyam (<i>Xanthosoma sagittifolium</i> (L) (Schott) germplasm in Ghana”, Ghana J. Agric. Sci, vol. 37, no. 1, pp. 23–31, Aug. 2006.