Runggu Ompusunggu, et al. “The Role of Intensity Modulated Radiation Therapy (IMRT) Techniques in External Radiation Therapy on the Value of Organ at Risk (OAR) Nasopharyngeal Carcinoma: Literature Review”. International Journal of Allied Medical Sciences and Clinical Research, vol. 10, no. 4, Jan. 2023, pp. 494-8, doi:10.61096/ijamscr.v10.iss4.2022.494-498.