Pantelis E., Antypas C., Petrokokkinos L., Karaiskos P., Papagiannis P., Kozicki M., Georgiou E., Sakelliou L. and Seimenis I. "Dosimetric characterization of CyberKnife radiosurgical photon beams using polymer gels, Med. Phys, 35, 2312-2320 (2008)", Abstract