1. G. Dôme, CERN Accelerator School, The Queen's College, Oxford, England, 1985, p. 370.
2. Proc. Int. School of Physics Enrico Fermi, Course XLVI, Varenna on Lake Como, 1969;Sands,1971
3. RF Group, YAERI-RIKEN SPring-8 Project Team, private communication.