Oonsiri, Puntiwa. “IsoCal evaluation for isocentric performance check of Varian linacs with C-series and TrueBeam”. Journal of Thai Association of Radiation Oncology 25, no. 2 (October 25, 2019): 19–27. accessed September 28, 2026. https://he01.tci-thaijo.org/index.php/jtaro/article/view/209546.