Keitel, Christoph H. Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;
http://link.aps.org/doi/10.1103/PhysRevA.63.053402 (Publisher version)
Hu, S., & Keitel, C. H. (2001). Dynamics of multiply charged ions in intense laser fields. Physical Review. A, 63(5): 053402. doi:10.1103/PhysRevA.63.053402.