Kampitak, Wireena. “Real - time Micro - convex probe ultrasound - guided Epidural anesthesia in patients with an abnormal spinal anatomy: Two case reports”. Thai Journal of Anesthesiology 39, no. 4 (June 23, 2016): 313–324. accessed September 21, 2026. https://he02.tci-thaijo.org/index.php/anesthai/article/view/59449.