The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
V. Balandin, N. Golubeva, “Approximate Matrices for Modeling the Focusing of the Undulator Periods and Undulator End Fields”, in Proc. 8th Int. Particle Accelerator Conf. (IPAC'17), Copenhagen, Denmark, May 2017, paper MOPIK069, pp. 686-688, ISBN: 978-3-95450-182-3, https://doi.org/10.18429/JACoW-IPAC2017-MOPIK069, http://jacow.org/ipac2017/papers/mopik069.pdf, 2017.