Balwinder Kaur et al. 2022. Comparison of Effect of Drotavarine Hydrochloride and a Combination of Hyoscine-N-Butyl Bromide & Valethamate Bromide on Duration of Active Phase of Labor. Issues and Developments in Medicine and Medical Research Vol. 11. (Mar. 2022), 18–38. DOI:https://doi.org/10.9734/bpi/idmmr/v11/2166C.