W. Arphasetthasakul, Y. . Chotmit, N. . Suthon, J. . Kumkhwao, and N. Arphasetthasakul, “The comparison of output constancy on linear accelerator between myQA Daily and Machine Performance Check”, Thai J Rad Tech, vol. 47, no. 1, pp. 17–22, Oct. 2022.