KAUSAR, U.; SIDDIQUI, N. To compare the efficacy of drotaverine hydrochloride with hyoscine butylbroumide for increasing the rate of cervical dilatation. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 6, n. 4, p. 1614–1620, 2017. DOI: 10.18203/2320-1770.ijrcog20171438. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/1652. Acesso em: 13 oct. 2025.