PROTON THERAPY WITH A FIXED BEAMLINE FOR SKULL-BASE CHORDOMAS AND CHONDROSARCOMAS: OUTCOMES AND TOXICITY Статья Gordon K., Gulidov I., Koryakin S., Smyk D., Makeenkova T., Gogolin D., Lepilina O., Golovanova O., Semenov A., Dujenko S., Medvedeva K., Mardynsky Y. Radiation Oncology. BioMed Central Ltd. Том 16. 2021.