Lewis, P. F., A. Kumari, and N. Bavdekar. “Maternal Outcome in Preterm Labor in a Tertiary Care Hospital”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 10, no. 1, Dec. 2020, pp. 222-7, doi:10.18203/2320-1770.ijrcog20205772.