د/ صالح عبدالله السالمي د/ صالح عبدالله السالمي. A quantitative study of the effectiveness of the tax system in increasing general budget revenues in Yemen during the period (1990-2015 AD). Civilization University Journal of Applied and Humanitarian Researches, [S. l.], v. 8, n. 08, 2025. DOI: 10.64295/cujahr.v8i08.83. Disponível em: https://journals.civilizationuniv.edu.ye/index.php/cujahr/article/view/83. Acesso em: 7 mar. 2026.