The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
M. Kuhlmann, E. Schneidmiller, and M.V. Yurkov, “Frequency Doubling Mode of Operation of Free Electron Laser FLASH2”, in Proc. 38th Int. Free Electron Laser Conf. (FEL'17), Santa Fe, NM, USA, Aug. 2017, paper MOP036, pp. 117-120, ISBN: 978-3-95450-179-3, https://doi.org/10.18429/JACoW-FEL2017-MOP036, 2018.