OKPERE, A.; OPARA, P. Mothers’ knowledge and practice of infant sleep position. Nigerian Journal of Paediatrics, [S. l.], v. 41, n. 4, p. 312–315, 2014. DOI: 10.4314/njp.v41i4.4. Disponível em: https://www.ajol.info/index.php/njp/article/view/107275. Acesso em: 25 oct. 2026.