Di Piazza, Antonino Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;
http://link.springer.com/article/10.1140%2Fepjst%2Fe2014-02157-3 (Publisher version)
King, B., & Di Piazza, A. (2014). Investigating the QED vacuum with ultra-intense laser fields. European Physical Journal-Special Topics, 223, 1063-1068. doi:10.1140/epjst/e2014-02157-3.