 
The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
@InProceedings{Saito:LINAC2018-MOPO076,
  author       = {H. Saito and others},
  title        = {{S}tudy on {G}eneration of {V}ariable {P}olarized {C}oherent {TH}z {R}adiation {U}sing a {C}rossed {U}ndulator},
  booktitle    = {Proc. 29th Linear Accelerator Conference (LINAC'18),
                  Beijing, China, 16-21 September 2018},
  pages        = {157--159},
  paper        = {MOPO076},
  language     = {english},
  keywords     = {undulator, radiation, polarization, electron, controls},
  venue        = {Beijing, China},
  series       = {Linear Accelerator Conference},
  number       = {29},
  publisher    = {JACoW Publishing},
  address      = {Geneva, Switzerland},
  month        = {Jan.},
  year         = {2019},
  isbn         = {978-3-95450-194-6},
  doi          = {doi:10.18429/JACoW-LINAC2018-MOPO076},
  url          = {http://jacow.org/linac2018/papers/mopo076.pdf},
  note         = {https://doi.org/10.18429/JACoW-LINAC2018-MOPO076},
}