Wistisen, Tobias Nyholm Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;
https://journals.aps.org/prd/pdf/10.1103/PhysRevD.100.036002 (Publisher version)
1905.05038.pdf (Preprint), 5MB
Wistisen, T. N. (2019). Investigation of two-photon emission in strong field QED using channeling in a crystal. Physical Review D, 100(3): 036002. doi:10.1103/PhysRevD.100.036002.