Amuh, V., A. Ehizele, and R. Esezobor. “Comparison of Oral Hygiene Status of Adult Individuals Using Charcoal Toothbrushes and Regular Nylon Toothbrushes in a Nigerian Health Facility”. Nigerian Journal of Medical and Dental Education, vol. 7, no. 1, Feb. 2025, pp. 6-15, https://www.ajol.info/index.php/njmde/article/view/289547.