E. Kovavisarach and W. Worachet, “Randomized Controlled Trial of Intravaginal 50 mcg Miso prostol and 3 mg Dinoprostone for Cervical Ripening and Labour Induction at Term with Unfavorable Cervix ”, Thai J Obstet Gynaecol, vol. 10, no. 1, pp. 27–32, Mar. 1998.