1. Collisions of alpha particles with light atoms. III. Nitrogen and oxygen atoms;Rutherford;Philos. Mag.,1919
2. Pituitary irradiation with high-energy proton beams: a preliminary report;Tobias;Cancer Res.,1958
3. Radiological use of fast protons;Wilson;Radiology,1946
4. The proton treatment center at Loma Linda University Medical Center;Slater;Int. J. Radiat. Oncol., Biol., Phys.,1991
5. Particles http://ptcog.web.psi.ch/ptcentres.html