Pankaj Rathod, and Dr. D.N.Raut. “STUDY OF BEAM ANGLES FOR DIFFERENT POSITIONS OF COLLIMATOR JAWS IN RADIOTHERAPY TREATMENT”. International Journal of Advance Engineering and Research Development (IJAERD), vol. 5, no. 6, June 2018, pp. 263-7, https://www.ijaerd.org/index.php/IJAERD/article/view/5163.