N. . Wickremeratne and R. J. . Patabendige, “The Role of Progressive Income Tax in relation to Economic Development”, IJSBAR, vol. 58, no. 2, pp. 133–143, Jun. 2021, Accessed: Sep. 11, 2025. [Online]. Available: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/12665