Seenukhroah, Adcharee. “Radiation Dose under Lead Block in Split Field Irradiation Using Cobalt - 60 Machine”. Maharat Nakhon Ratchasima Hospital Journal 31, no. 2 (September 26, 2024): 105–112. accessed June 30, 2025. https://he04.tci-thaijo.org/index.php/MNRHJ/article/view/1981.