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, [S. l.], v. 5, n. 7, p. 26–36, 2023. DOI: 10.31149/ijefsd.v5i7.4605. Disponível em: https://journals.researchparks.org/index.php/IJEFSD/article/view/4605. Acesso em: 25 sep. 2026.