Balasubramaniam, Devi, T. V. Chitra, and Seetha Panicker. 2017. “Outcome of Emergency Cerclage for Advanced Cervical Dilatation: A Retrospective Analysis”. International Journal of Research in Medical Sciences 3 (1):229-34. https://www.msjonline.org/index.php/ijrms/article/view/1240.