A. M. Sessler, Collective phenomena in accelerators " . in proc, p.72

M. Pabst, K. Bongardt, and A. Letchford, Progress on intense proton beam dynamics and halo formation

P. M. Lapostolle and A. L. Septier, Linear Accelerators, 1970.

M. Eshraqi, End to end beam dynamics of the ESS linac " . in proc, p.12