A AL–SULTAN, F. Aqueous extract of propolis in the treat-ment of recurrent aphthus stomatitis (Double blind study). Al-Rafidain Dental Journal, [S. l.], v. 3, n. 2, p. 96–102, 2003. DOI: 10.33899/rden.2003.165763. Disponível em: https://rden.uomosul.edu.iq/index.php/rden/article/view/34650. Acesso em: 12 jan. 2026.