The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
B.C. Jiang, J.H. Chen, Q.L. Zhang, and Z.T. Zhao, “Using a Bessel Light Beam as an Ultra-short Period Helical Undulator”, in Proc. 13th Symposium on Accelerator Physics (SAP'17), Jishou, China, Aug. 2017, paper TUAH4, pp. 121-123, ISBN: 978-3-95450-199-1, https://doi.org/10.18429/JACoW-SAP2017-TUAH4, 2018.