@article {2471, title = {Bright Betatronlike X Rays from Radiation Pressure Acceleration of a Mass-Limited Foil Target}, journal = {Phys. Rev. Lett.}, volume = {110}, number = {045001}, year = {2013}, url = {http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.110.045001}, author = {Tong-Pu Yu and Alexander Pukhov and Zheng-Ming Sheng and Feng Liu and Gennady Shvets} }