Probing nucleobase photoprotection with soft x-rays B. K. McFarland, J. P. Farrell, N. Berrah, C. Bostedt, J. Bozek, P.H. Bucksbaum, R. Coffee, J. Cryan, L. Fang, R. Feifel et al. (18 more) EPJ Web of Conferences, 41 (2013) 07004 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134107004