ABDULRAHMAN, T. The concept of useful speech between Arab grammarians and modern linguists. Adab Al-Rafidayn, [S. l.], v. 22, n. 24, p. 151–172, 1993. DOI: 10.33899/radab.1992.165089. Disponível em: https://jwups.uomosul.edu.iq/index.php/radab/article/view/32272. Acesso em: 28 sep. 2025.