Mohd Ali, N. S., K. Hamzah, and R. Jamro. “Simulation of Beam Collimator for Neutron Radiography Using Monte Carlo Method”. JOURNAL of NUCLEAR and Related TECHNOLOGIES, Vol. 13, no. 02, Dec. 2016, pp. 1-6, http://jnrtmns.net/index.php/jnrt/article/view/39.