AYO-YUSUF, O.; SZYMANSKI, B. Factors associated with smoking cessation in South Africa. South African Medical Journal, [S. l.], v. 100, n. 3, 2010. DOI: 10.7196/samj.3842. Disponível em: https://www.ajol.info/index.php/samj/article/view/53748. Acesso em: 31 jul. 2026.