The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
X. Yang, L. Giannessi, and N.S. Mirian, “Post-Saturation Dynamics and Superluminal Propagation of a Super-Radiant Spike in a Free-Electrons Laser Amplifier”, presented at the 39th Free Electron Laser Conf. (FEL'19), Hamburg, Germany, Aug. 2019, paper MOD04, unpublished.