Yodtongde, N., V. Boonkitticharoen, M. Dhanachai, and P. Puataweepong. “Comparison of Second Cancer Risk in Patients with Liver Cancer Treated By Stereo-tactic Body Radiotherapy and Three-Dimensional Conformal Radiotherapy”. Research Medical Journal, vol. 35, no. 3, Sept. 2012, pp. 202-10, https://he02.tci-thaijo.org/index.php/ramajournal/article/view/135188.