Sushma Shikha, Kumar Devashish, Prerna Tejaswi, and Seema, “A Hospital Based Prospective Study to Compare the Efficacy of Drotaverine Hydrochloride and Valethamate Bromide on Cervical Dilation in Active Labour at Tertiary Care Center”, Int. J. Heal. Clin. Res., vol. 4, no. 24, pp. 104–106, Dec. 2021.