Sari F. Alkhatib and  Chang Je Park and  Gyuhong Roh,  A Study on the Iterative Scheme for Stratified Shields Gamma Ray Buildup FactorsUsing Layer-Splitting Technique in Double-Layer Shields.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2014, vol. 89(5). 766 - 768
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/9998234.