1. International Commission on Radiation Units and Measurements, Bethesda, MD, Stopping Powers and Ranges for Protons and Alpha Particles, ICRU Report 49, 1993
2. http://www.exphys.uni-linz.ac.at/stopping/
3. An empirical approach to the stopping power of solids and gases for ions from 3Li to 18Ar
4. M.J. Berger, ASTAR, computer code for calculating stopping powers and ranges for helium ions, Report NISTIR 4999, 1992 (version 2, 12 August 1993). See also http://physics.nist.gov/PhysRefData/Star/Text/programs.html
5. M. Berger, H. Bichsel, BEST, BEthe STopping power program, 1994