The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
G. Marcus et al., “Regenerative Amplification for a Hard X-Ray Free-Electron Laser”, in Proc. FEL'19, Hamburg, Germany, Aug. 2019, pp. 118-121. doi:10.18429/JACoW-FEL2019-TUP032