Khaldun, M. I., A. W. Harto, and Y. Sardjono. “An Optimization Design of Collimator in The Thermal Column of Kartini Reactor For BNCT”. Indonesian Journal of Physics and Nuclear Applications, vol. 2, no. 2, June 2017, pp. 54-64, doi:10.24246/ijpna.v2i2.54-64.