Awode, U.A., A. Uzairu, M.L. Balarabe, G.F.S. Harrisson, and O.J. Okunola. “Assessment of Peppers and Soils for Some Heavy Metals from Irrigated Farmlands on the Bank of River Challawa, Northern Nigeria”. Pakistan Journal of Nutrition 7, no. 2 (February 15, 2008): 244–248. Accessed July 8, 2025. https://pjnonline.org/pjn/article/view/625.