Bright O. Osu and  Edikan E. Akpanibah and  Chidinma Olunkwa,  Mean-Variance Optimization of Portfolios with Return of Premium Clauses in a DC Pension Plan with Multiple Contributors under Constant Elasticity of Variance Model.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    May 2018, vol. 137(5). 89 - 94
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10009086.