Ariyanuchikul, T. “The Postoperative Pain Assessment and Treatment in Recovery Room, Maharat Nakhon Ratchasima Hospital”. Maharat Nakhon Ratchasima Hospital Journal, vol. 34, no. 2, Sept. 2024, pp. 115-22, https://he04.tci-thaijo.org/index.php/MNRHJ/article/view/1799.