Keitel, Christoph H. Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;
http://iopscience.iop.org/0953-4075/31/3/002/ (Publisher version)
Keitel, C. H., Szymanowski, C., Knight, P. L., & Maquet, A. (1998). Radiative reaction in ultra-intense laser - atom interaction. Journal of Physics B: Atomic, Molecular and Optical Physics, 31(3), L75-L83. doi:10.1088/0953-4075/31/3/002.