1. http://ptcog.web.psi.ch/.
2. L. Arnaudon et al., Linac4 Technical Design Report, Report CERN-AB-2006-084-ABP/RF, 2006.
3. F. Gerigk et al., Conceptual Design of the SPL II, CERN-2006-006, 2006.
4. A Guide to Radiation and Radioactivity Levels Near High Energy Particle Accelerators;Sullivan,1992
5. Shielding design for the front end of the CERN SPL