Wittayapairoch, P., S. Leeprasert, S. Simajaruk, and K. Panichkul. “Analgesic Effect of Ice Cooling on Pain Perception Prior to Local Injection in Spinal Anesthesia: a Prospective Randomized Controlled Trial”. Thai Journal of Anesthesiology, vol. 50, no. 3, May 2024, pp. 163-8, https://he02.tci-thaijo.org/index.php/anesthai/article/view/269136.