Promise A. Azor and  Avievie Igodo and  Esabai M. Ase,  Explicit Solution of an Investment Plan for a DC Pension Scheme with Voluntary Contributions and Return Clause under Logarithm Utility.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2023, vol. 200(8). 115 - 121
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10013228.