Alam, M.J., Rabbani, K., Zakaria, G., Hussain, S.A., Kiber, A. and Baig, T. 2008. A modified formula for defining tissue phantom ratio of photon beams. Bangladesh Medical Research Council Bulletin. 33, 3 (Sep. 2008), 92–97. DOI:https://doi.org/10.3329/bmrcb.v33i3.1140.