JAMES, S. Effectiveness of Entonox use in pain and comfort level of parturient mothers during first stage of labor. Journal of Biomedical Sciences, [S. l.], v. 6, n. 3, p. 11, 2019. DOI: 10.3126/jbs.v6i3.26843. Disponível em: https://www.nepjol.info/index.php/JBS/article/view/26843. Acesso em: 20 sep. 2024.