Singers Sørensen, Brita, et al. “In Response to the Commentary ‘Particle Species Dependence of Cell Survival Relative Biological Effectiveness: Evident and Not negligible’ by Thomas Friedrich, Marco Durante & Michael Scholz”. Acta Oncologica, vol. 52, no. 3, Apr. 2013, p. 591, doi:10.3109/0284186X.2013.767985.