Dahal, P., Banerjee, B., Uprety, D., Das, B., Thakur, A. and Agrawal, A. 2013. Comparative study of efficacy of drotaverine hydrochloride and valethamate bromide with control in first stage of labour. Health Renaissance. 11, 1 (Feb. 2013), 38–42. DOI:https://doi.org/10.3126/hren.v11i1.7600.