Alam, M Jahangir, KS Rabbani, GA Zakaria, SM Akram Hussain, Adnan Kiber, and Tanvir Baig. “A Modified Formula for Defining Tissue Phantom Ratio of Photon Beams”. Bangladesh Medical Research Council Bulletin 33, no. 3 (September 15, 2008): 92–97. Accessed May 20, 2022. https://www.banglajol.info/index.php/BMRCB/article/view/1140.