R. G. Sayegh and N. H. Saade, “Optimal Tax Rate and Economic Growth : an Empirical Application to the Case of Lebanon”, DEM, vol. 5, no. 2, pp. 66–86, Dec. 2020, Accessed: Sep. 12, 2025. [Online]. Available: https://ojs.fimagis.pl/index.php/demo/article/view/1186