Felix, O., I. L. Nwaogazie, O. Akaranta, and G. O. Abu. “Heavy Metals Removal From Spent Synthetic-Based Drilling Mud Using Nano Zero-Valent Iron (nZVI)”. New Insights on Chemical Research Vol. 1, Dec. 2019, pp. 55-69, https://stm1.bookpi.org/index.php/nicr-v1/article/view/692.