Stephen Delle Donpaala. “Portfolio That Constitutes Risk-Free Investments for Purposes of Effective Pension Planning and Management in Ghana”. International Journal on Economics, Finance and Sustainable Development 5, no. 7 (July 12, 2023): 26–36. Accessed September 25, 2026. https://journals.researchparks.org/index.php/IJEFSD/article/view/4605.