John, L. B., R. R. P., and S. Ghose. “Leading Twin in Breech Presentation, Is Routine Caesarean Section Necessary?”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 5, no. 2, Dec. 2016, pp. 375-8, doi:10.18203/2320-1770.ijrcog20160373.