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 Doubler and Two-color Mode of Operation at Free Electron Laser FLASH2”, in Proc. 8th Int. Particle Accelerator Conf. (IPAC'17), Copenhagen, Denmark, May 2017, paper WEPAB027, pp. 2635-2638, ISBN: 978-3-95450-182-3, https://doi.org/10.18429/JACoW-IPAC2017-WEPAB027, http://jacow.org/ipac2017/papers/wepab027.pdf, 2017.