Taechakraichana, N. .; Jaisamrarn, U. .; Tannirandorn, Y.; Trivijitsilp, P.; Termrungruanglert , W. Induction of Labour by Prostaglandin E2 Intracervical Gel or Vaginal Suppository. Thai J Obstet Gynaecol 1996, 8, 9-14.