Saager, Maria, et al. “The Relative Biological Effectiveness of Carbon Ion Irradiations of the Rat Spinal Cord Increases Linearly With LET up to 99 keV μm”. Acta Oncologica, vol. 55, no. 12, Dec. 2016, pp. 1512-5, doi:10.1080/0284186X.2016.1250947.