Oyegoke, Odunayo Adiat, K. S. Adekeye, D. M. Okewole, O. O. Oladipupo, and O. I. Adegbite. 2026. “Phase I Ridge-Regularised Multivariate Coefficient of Variation Control Charts for High-Dimensional Processes Under Localised Contamination”. Journal of the CISON 37 (1). Abuja, NG:77-98. https://journal.cison.org.ng/index.php/jotc/article/view/51.