H.W. Kim, I.H. Baek, M.S. Chae, B.A. Gudkov, B. Han, K.H. Jang, \emph{et al.}, "Comparison of Astra Simulations With Beam Parameter Measurements at the Kaeri Ultrashort Pulse Facility", in Proc. 37th International Free Electron Laser Conference, Daejeon, Republic of Korea, August 2015, paper MOP018, pp. 74-76, ISBN: 978-3-95450-134-2, doi:10.18429/JACoW-FEL2015-MOP018, http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop018.pdf, 2015.