Abubakar, A.L. et al. 2021. Effect of salinity stress on the antioxidant defence systems of two varieties of cowpea (Vigna unguiculata L.). Journal of Biological Research and Biotechnology. 19, 2 (Nov. 2021), 1306–1316. DOI:https://doi.org/10.4314/br.v19i2.4.