The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
W. Ackermann, H. De Gersem, and T. Weiland, “Eigenvalue Calculations Based on the Finite Element Method With Physically Motivated Field Smoothing Using the Kirchhoff Integral”, in Proc. 8th Int. Particle Accelerator Conf. (IPAC'17), Copenhagen, Denmark, May 2017, paper WEPIK064, pp. 3074-3076, ISBN: 978-3-95450-182-3, https://doi.org/10.18429/JACoW-IPAC2017-WEPIK064, http://jacow.org/ipac2017/papers/wepik064.pdf, 2017.