Nkeki, Charles I. “Optimal Surplus and Minimum Benefits for a Defined Contribution Pension Plan: A Mean-Variance Approach”. Statistics, Optimization & Information Computing 6, no. 4 (November 2, 2018): 560-576. Accessed November 15, 2024. http://47.88.85.238/index.php/soic/article/view/20181206.