DAHAL, P; BANERJEE, B; UPRETY, DK; DAS, BP; THAKUR, A; AGRAWAL, A. Comparative study of efficacy of drotaverine hydrochloride and valethamate bromide with control in first stage of labour. Health Renaissance, [S. l.], v. 11, n. 1, p. 38–42, 2013. DOI: 10.3126/hren.v11i1.7600. Disponível em: https://nepjol.info./index.php/HREN/article/view/7600. Acesso em: 9 mar. 2025.