EP-1974: Multi-scenario robustness evaluation; transition to a 'proton proof' alternative to PTV evaluation. (April 2018) - Korevaar, E.W.; Scandurra, D.; Gelderman, M.; Kierkels, R.G.; Knopf, A.C.; Both, S.; Unipan, M.; Eenink, M.G.C.; Langendijk, J.A.