Floquet, A. B. ., R. Maliki, R. C. . Tossou, and C. Tokpa. “Dynamics of Yam-Based Cropping Systems in the Guineo-Sudanian Savannahs in Benin”. Cahiers Agricultures, vol. 21, no. 6, Nov. 2012, pp. 427-437 (1), doi:10.1684/agr.2012.0597.