Michael OG, Oluseyi AV. A Comparative Study of Immediate Annuities and Ordinary Annuities in establishing the Phantom of Zero Liability Under the Trusteeship Pension Valuation Structure. JBM [Internet]. 2023 May 2 [cited 2026 May 13];7(01):102-25. Available from: https://nepjol.info/index.php/jbm/article/view/54549