T. Murata, K. Hachiya, T. Katsurayama, T. Kii, T. Konstantin, K. Masuda, \emph{et al.},
   "Development of Phonon Dynamics Measurement System by MIR-FEL and Pico-second Laser",
   in Proc. 37th International Free Electron Laser Conference, Daejeon, Republic of Korea, August 2015, paper WEP010, pp. 615-617,
    ISBN: 978-3-95450-134-2,
    doi:10.18429/JACoW-FEL2015-WEP010,
    http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/wep010.pdf, 2015.