C.-Y. Tsai, D. Douglas, R. Li, and C. Tennant,
   "Multistage CSR Microbunching Gain Development in Transport or Recirculation Arcs",
   in Proc. 37th International Free Electron Laser Conference, Daejeon, Republic of Korea, August 2015, paper MOP087, pp. 263-268,
    ISBN: 978-3-95450-134-2,
    doi:10.18429/JACoW-FEL2015-MOP087,
    http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop087.pdf, 2015.