Todumrong, N., D. Charoenvidhya, and B. Uerpairojkit. “Use of Placental Pulsatility Index in High Risk Pregnancy to Predict Fetal Growth Restriction”. Thai Journal of Obstetrics and Gynaecology, vol. 30, no. 1, Jan. 2022, pp. 68-75, doi:10.14456/tjog.2022.9.