M. A. Bakr, M. Khojoyan, M. Krasilnikov, F. Stephan, and G. Vashchenko,
   "Beam Dynamics Simulation for the Upgraded PITZ Photo Injector Applying Various Photocathode Laser Pulses",
   in Proc. 37th International Free Electron Laser Conference, Daejeon, Republic of Korea, August 2015, paper TUP065, pp. 501-504,
    ISBN: 978-3-95450-134-2,
    doi:10.18429/JACoW-FEL2015-TUP065,
    http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tup065.pdf, 2015.