Chuchotirot, Monsak, and Anuwat Sutanthavibul. 2002. “Prediction of Adverse Perinatal Outcome by Umbilical Artery to Middle Cerebral Artery Resistance Index Ratio in Pregnancies Complicated by Hypertensive Disorder”. Siriraj Medical Journal 54 (10):611-16. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245317.