Harungsri, Natthaporn. “The relationship between abdominal circumference and intravenous ephedrine dose during elective cesarean section under spinal anesthesia”. Krabi Medical Journal 5, no. 2 (January 10, 2023): 17–25. accessed January 23, 2025. https://he01.tci-thaijo.org/index.php/KBJ/article/view/261040.