Paul, Kumaresh Chandra, Guenther H Hartmann, and Golam Abu Zakaria. 2018. “Study on the Displacement Effect at Cylindrical Ionization Chambers in High Energy Photon of Flat and True Beams”. Journal of Bangladesh Academy of Sciences 41 (2):227-35. https://doi.org/10.3329/jbas.v41i2.35500.