1. J. G. Holt, G. R. Edelstein, and T. E. Clark, Phys. Med. Biol. 20: 559 (1975).
2. B. Paliwal and P. R. Almond, Phys. Med. Biol. 20: 547 (1975).
3. M. G. Gantchew and K. Toushlekova, Phys. Med. Biol. 21: 300 (1976).
4. H. L. Beck, “A Monte Carlo Simulat ion of the Transport of Electrons and Photons in Matter,” USAEC Report HASL-213 (1969).
5. H. L. Beck, “Energy Spectra from Coupled Electron-Photon Slowing Down,” USERDA Report HASL-309 (1976).