Kittiponghansa, A., C. Suttinarakorn, W. Yingphoonphon, P. Plengpanich, W. Somdee, and A. Kotesombut. “Comparing the Efficacy of Thoracic Paravertebral Block and Diclofenac to Reduce Postoperative Pain in Patients undergoing Unilateral Mastectomy: A Prospective Randomized Controlled Trial”. Thai Journal of Anesthesiology, vol. 47, no. 3, May 2021, pp. 210-5, https://he02.tci-thaijo.org/index.php/anesthai/article/view/250925.