Chompubai, Phakaporn, Suratda Pichayaphan, and Chayada Wongsuwan. “Efficacy of Patient-Administered Oral Analgesia after Elective Cesarean Section”. Thai Journal of Anesthesiology 51, no. 5 (August 27, 2025): 329–338. accessed September 20, 2026. https://he02.tci-thaijo.org/index.php/anesthai/article/view/277307.