1. S. Henderson, in Proceedings of the Particle Accelerator Conference, Albuquerque, USA, 2007.
2. Accelerator Group JAERI/KEK Joint Project Team, “Accelerator Technical Design Report for J-PARC,” KEK Report 2002-13; JAERI-Tech 2003-044 (2003).
3. D. Findlay, in Proceedings of the Particle Accelerator Conference, USA, 2007, p. 695.