A. P. K. Dhillon, H. K. Shergill, and P. Yadav, “Comparative study between vaginal isosorbide mononitrate and misoprostol for induction of cervical ripening prior to surgical evacuation of first trimester embryonic demise”, Int J Reprod Contracept Obstet Gynecol, vol. 4, no. 2, pp. 398–401, Feb. 2017.