« Growth components and chemical composition of some improved dual-purpose cowpea (Vigna unguiculata L. Walp) varieties as influenced by manure application ». Nigerian Journal of Animal Production 44, no. 2 (décembre 26, 2020): 299–310. Consulté le octobre 30, 2026. https://njap.org.ng/index.php/njap/article/view/1122.