KARGBO, B. I. B.; EGWAIKHIDE, F. O. Tax Elasticity in Sierra Leone: A Time Series Approach. International Journal of Economics and Financial Issues, [S. l.], v. 2, n. 4, p. 432–447, 2012. Disponível em: https://www.econjournals.com/index.php/ijefi/article/view/280. Acesso em: 18 may. 2022.