I. I. Udousoro and E. S. Essien, “Elemental Composition in Soil Profiles around an Aluminum Smelting Industry-Alscon in Ikot Abasi, Nigeria, Using XRF Technique”, IJSBAR, vol. 23, no. 2, pp. 215–236, Jul. 2015, Accessed: Jan. 15, 2026. [Online]. Available: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/4335