Chaotrakool, C.; Hayakungchat, S.; Tangsiriwatthana, T. Efficacy of Oral Isosorbide Mononitrate Sustained-Release for Pre-Induction Cervical Ripening in Term Pregnant Women in an Outpatient Setting: A Randomized Controlled Trial. Thai J Obstet Gynaecol 2019, 27, 13-21.