. A. Adesoye, . A. Emese, and . . O. Olayode, “In Vitro Regeneration of African Yam Bean (Sphenostylis stenocarpa (Hochst ex. A. Rich.) Harms by Direct Organogenesis”, Agr. Nat. Resour., vol. 46, no. 4, pp. 592–602, Aug. 2012.