A. J. G. Cairns, D. Blake and K. Dowd, “Stochastic Lifestyling: Optimal Dynamic Asset Allocation for Defined Contribution Pension Plans,” Journal of Economic Dynamics & Control, Vol. 30, No. 6, 2006, pp. 843-877.
 S. Brawne, A. M. Milevsky and T. S. Salisbury, “Asset Allocation and the Liquidity Premium for Illiquid Annuities,” The Journal of Risk and Insurance, Vol. 70, No. 3, 2003, pp. 509-526.
 G. Deelstra, M. Grasselli and P. Koehl, “Optimal Investment Strategies in the Presence of a Minimum Guarantee,” Insurance: Mathematics and Economics, Vol. 33, No. 1, 2003, pp. 189-207.
 G. Deelstra, M. Grasselli and P. Koehl, “Optimal Design of the Guarantee for Defined Contribution Funds,” Journal of Economics Dynamics and Control, Vol. 28, No. 11, 2004, pp. 2239-226.
 C. R. Nwozo and C. I. Nkeki, “Optimal Investment Strategy for a Defined Contributory Pension Plan in Nigeria Using Dynamic Optimization Technique,” Studies in Mathematical Sciences, Vol. 2, No. 2, 2011, pp. 43-60.
 C. R. Nwozo and C. I. Nkeki, “Optimal Investment and Portfolio Strategies with Minimum Guarantee and Inflation Protection for a Defined Contribution Pension Scheme,” Studies in Mathematical Sciences, Vol. 2, No. 2, 2011, pp. 78-89.
 C. R. Nwozo and C. I. Nkeki, “Optimal Portfolio and Strategic Consumption Planning in a Life-Cycle of a Pension Plan Member in A Defined Contributory Pension Scheme,” IAENG International Journal of Applied Mathematics, Vol. 41, No. 4, 2011, p. 299.
 C. I. Nkeki and C. R. Nwozo, “Variational Form of Classical Portfolio Strategy and Expected Wealth for a Defined Contributory Pension Scheme,” Journal of Mathematical Finance, Vol. 2, No. 1, 2012, 132-139.
 C. I. Nkeki and C. R. Nwozo, “Optimal Investment under Inflation Protection and Optimal Portfolios with Stochastic Cash Flows Strategy,” To appear in IAENG Journal of Applied Mathematics, Vol. 43, No. 2, 2013, p. 54.