K, Smitha, Sowmya K, and Malathi T. 2017. “Study of Doppler Waveforms in Pregnancy Induced Hypertension and Its Correlation With Perinatal Outcome”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 3 (2):428-33. https://www.ijrcog.org/index.php/ijrcog/article/view/956.