Jogi, S. R. (2017) “To compare the efficacy of Drotaverine hydrochloride and Valethamate bromide in shortening of the first stage of labour”, International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 4(4), pp. 1038–1043. doi: 10.18203/2320-1770.ijrcog20150402.