Rai, R., P. Basnet, A. Thakur, and T. Pradhan. “Vaginal Administration of Isosorbide Mononitrate for Cervical Ripening Prior to Induction of Labor for Postdated Pregnancy: A Randomized Controlled Trial”. Journal of BP Koirala Institute of Health Sciences, vol. 1, no. 1, May 2018, pp. 51-58, doi:10.3126/jbpkihs.v1i1.19754.