Singh, A., A. Daharwal, A. Kujur, and P. Awasthi. “Effect of Sildenafil on IUGR”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 6, no. 5, Apr. 2017, pp. 1806-9, doi:10.18203/2320-1770.ijrcog20171562.