The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
S.H. Kim, “Parameterization of Helical Superconducting Undulator Magnetic Field*”, in Proc. North American Particle Accelerator Conf. (NAPAC'16), Chicago, IL, USA, Oct. 2016, paper WEPOB06, pp. 894-896, ISBN: 978-3-95450-180-9, https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB06, https://jacow.org/napac2016/papers/wepob06.pdf, 2017.