Kouam EB, P. RS, E. I, and M. GM. “Genetic Diversity and Population Structure of Vigna Unguiculata Ssp. Unguiculata Var. Spontanea in Sudan”. Journal of Research in Biology, Vol. 1, no. 8, Dec. 2011, pp. 643-52, https://ojs.jresearchbiology.com/ojs1/index.php/jrb/article/view/156.