Keitel, Christoph H. Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;
http://link.aps.org/doi/10.1103/PhysRevA.45.3242 (Publisher version)
Keitel, C. H., Scully, M. O., & Süßmann, G. (1992). Triggered superradiance. Physical Review. A, 45(5), 3242-3249. doi:10.1103/PhysRevA.45.3242.