EL-SAMARRAI , S. . Extrinsic black dental stains in relation to dental caries and mutans streptococci in saliva. Mustansiria Dental Journal, [S. l.], v. 1, n. 2, p. 148–152, 2004. DOI: 10.32828/mdj.v1i2.1111. Disponível em: https://mdj.uomustansiriyah.edu.iq/index.php/mdj/article/view/1111. Acesso em: 22 jul. 2024.