1.Ishikawa, Y., Suzuki, M., Yamaguchi, H. et al. Long-term survival after definitive proton beam therapy for oligorecurrent esophageal squamous cell carcinoma: a case report. J Med Case Reports 16, 68 (2022). https://doi.org/10.1186/s13256-022-03275-0
2.Bischoff, Martin et al.Outcome After Modern Proton Beam Therapy in Childhood Craniopharyngioma: Results of the Prospective Registry Study KiProReg.International Journal of Radiation Oncology, Biology, Physics, Volume 120, Issue 1, 137 - 148