The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
G. Zhou, Y. Jiao, J. Wu, G. Xu, and T. Zhang, “Power Improvement of Free-Electron Laser Using Transverse-Gradient Undulator with External Focusing”, in Proc. 7th Int. Particle Accelerator Conf. (IPAC'16), Busan, Korea, May 2016, paper MOPOW020, pp. 760-762, ISBN: 978-3-95450-147-2, doi:10.18429/JACoW-IPAC2016-MOPOW020, http://jacow.org/ipac2016/papers/mopow020.pdf, 2016.