1. Particle Therapy Facilities in Operation.
https://doi.org/www.ptcog.ch/index.php/facilities-in-operation
.
2. Alekseev, N.N., Akimov, G.N., Alekseev, P.N., Balanutsa, V.N., Bulykin, B.I., Volkov, B.A., Gaponenko, S.V., Gachurin, V.V., Goryachev, Yu.M., Evtikhovich, V.N., Zhuravlev, A.S., Zavodov, V.P., Zavrazhnov, V.S., Zenkevich, P.R., Ivanov, N.E., et al., Phys. Part. Nucl. Lett., 2004, vol. 1, no. 3, p.156.
3. Stelzer, H., Nucl. Phys. B, Proc. Suppl., 1998, vol. 61, p.650.
4. Torikoshi, M., Minohara, S., Kanematsu, N., Komo-ri, M., Ranazawa, M., Noda, K., Miyahara, N., Itoh, H., Endo, M., and Kanai, T.J., J. Radiat. Res., 2007, vol. 48, no. Suppl. A, p. A15.
5. Akagi, T., Higashi, A., Tsugami, H., Sakamoto, H., Masuda, Y., and Hishikawa, Y., Phys. Med. Biol., 2003, vol. 48, no. 22, p. N301.