Sirpurkar, M., V. P. Anjankar, K. Wankhede, L. Khanzode, and S. Jawade. “Study of Correlation Between Perinatal Outcome, Placental Coefficient and Feto-Placental Ratio”. International Journal of Research in Medical Sciences, vol. 3, no. 4, Jan. 2017, pp. 925-8, https://www.msjonline.org/index.php/ijrms/article/view/1409.