1. R. Brun, F. Bruyant, M. Maire, A.C. McPheson, P. Zanarini, “GEANT3,” CERN DD/EE/84-1, 1987.
2. Electron Gamma Shower (EGS) transport code: http://www.slac.stanford.edu/egs/.
3. Monte Carlo N-Particle (MCNP) transport code: http://laws.lanl.gov/x5/MCNP/index.html.
4. Geometry And Tracking (Geant) transport code: http://www.cern.ch/geant4.