The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
V.A. Goryashko, P.M. Salén, and G.K. Shamuilov, “From Femtosecond to Attosecond Coherent Undulator Pulses”, presented at the 39th Free Electron Laser Conf. (FEL'19), Hamburg, Germany, Aug. 2019, paper THD01, unpublished.