O. Edmund and F. K. Funke, “Chemical Speciation of some selected Heavy Metals in Soil from the Obajana Industrial Zone Kogi State, Nigeria”, IJRTI, vol. 2, no. 1, pp. 85–92, Apr. 2025, Accessed: Jun. 12, 2026. [Online]. Available: https://www.ijrti.com.ng/index.php/home/article/view/61