Santichatngam, P. “Circular Stapler Hemorrhoidectomy in Maharat Nakhon Ratchasima Hospital”. Maharat Nakhon Ratchasima Hospital Journal, vol. 24, no. 3, Oct. 2024, pp. 145-52, https://he04.tci-thaijo.org/index.php/MNRHJ/article/view/2271.