SYAHRIL, M. A. F.; HASAN, H. A Comparative Research on the Effectiveness of Progressive versus Proportional Tax Systems in Enhancing Social Justice. Administrative and Environmental Law Review, [S. l.], v. 5, n. 2, p. 97–106, 2024. DOI: 10.25041/aelr.v5i2.3479. Disponível em: https://jurnal.fh.unila.ac.id/index.php/aelr/article/view/3479. Acesso em: 5 sep. 2025.