Sriprom, P., and P. Prom-on. “Comparative Ultrasound Assessment of Gastric Volume between Apple Juice and Water Ingestion 2 Hours before General Anesthesia in Elective Surgery: a Prospective Randomized Controlled Trial”. Thai Journal of Anesthesiology, vol. 51, no. 2, Mar. 2025, pp. 87-98, https://he02.tci-thaijo.org/index.php/anesthai/article/view/274050.