E. PratS. Reiche,
   "Time Locking Options for the Soft X-Ray Beamline of SwissFEL",
   in Proc. 37th International Free Electron Laser Conference, Daejeon, Republic of Korea, August 2015, paper TUP019, pp. 388-392,
    ISBN: 978-3-95450-134-2,
    doi:10.18429/JACoW-FEL2015-TUP019,
    http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tup019.pdf, 2015.