Y. Honda, A. Aryshev, M. Shevelev, and M. Shimada,
   "Terahertz Source Utilizing Resonant Coherent Diffraction Radiation at KEK ERL Test Accelerator",
   in Proc. 37th International Free Electron Laser Conference, Daejeon, Republic of Korea, August 2015, paper TUP080, pp. 547-549,
    ISBN: 978-3-95450-134-2,
    doi:10.18429/JACoW-FEL2015-TUP080,
    http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tup080.pdf, 2015.