ONYEKA-UBAKA, J. N., and K. C. OHANMO. “VOLATILITY AND RISK ANALYSIS OF SELECTED COMPANIES IN NIGERIAN STOCK EXCHANGE”. Unilag Journal of Mathematics and Applications, Vol. 4, no. 2, June 2025, pp. 17-39, https://lagjma.unilag.edu.ng/article/view/2627.