G. Penn, P. Emma, E. Hemsing, Z. Huang, G. Marcus, J. Qiang, \emph{et al.},
   "Effect of Microbunching on Seeding Schemes for LCLS-II",
   in Proc. 37th International Free Electron Laser Conference, Daejeon, Republic of Korea, August 2015, paper WEP025, pp. 639-642,
    ISBN: 978-3-95450-134-2,
    doi:10.18429/JACoW-FEL2015-WEP025,
    http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/wep025.pdf, 2015.