Eboh, Dennis E.O. “A Study of Morphological Patterns of Lip Prints Among The Yorubas in Okitipupa, South-Western Nigeria”. African Journal of Tropical Medicine and Biomedical Research, vol. 1, no. 4, Nov. 2020, pp. 29-36, https://www.ajtmbr.org.ng/index.php/home/article/view/25.