Kanchana, M. P., M. P. Sellamuthu, and R. Mahendran. “A Rare Case Report of Congenital High Airway Obstruction Syndrome Presenting in a 23 Weeks Foetus”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 7, no. 3, Feb. 2018, pp. 1277-80, doi:10.18203/2320-1770.ijrcog20180938.