Igharo, O. G., M. A. Okungbowa, E. L. Igharo, and O. M. Ezegbogu. “Essential Metal Levels in Cosmetologists, Heavy Cosmetic Users and Cosmetic-Naive Individuals in Benin City, South-South, Nigeria”. Nigerian Journal of Pharmaceutical and Applied Science Research, vol. 7, no. 1, Aug. 2020, pp. 29-33, https://nijophasr.net/index.php/nijophasr/article/view/203.