Wanapirak, Chanane, and Somjet Chaijaroen. “Doppler Index for Prediction of Benign and Malignant Ovarian Tumour”. Thai Journal of Obstetrics and Gynaecology 9, no. 3 (September 1, 1997): 213–218. accessed September 28, 2026. https://he02.tci-thaijo.org/index.php/tjog/article/view/257250.