AHMED, A. A. "Strength and weakness coefficient of Arabic letters". JOURNAL OF LANGUAGE STUDIES, [S. l.], v. 5, n. 3, p. 106–134, 2022. DOI: 10.25130/jls.5.3.7. Disponível em: https://jls.tu.edu.iq/index.php/jls/article/view/475. Acesso em: 4 nov. 2025.