R. J. Komolafe, J. O. Agbolade, A. A. Ajiboye, and R. T. Mustapha, “Genetic variability studies in seven accessions of cowpea (Vigna unguiculata L. Moench.) using nine quantitative traits and chlorophyll content of leaves”, J Biol Res, vol. 92, no. 2, Nov. 2019.