%\cite{Nuhn:FEL2015-WED01}
\bibitem{Nuhn:FEL2015-WED01}
    H.-D.~Nuhn, S.D.~Anderson, J.~Buck, R.N.~Coffee, Y.~Ding, G.~Hartmann, \emph{et al.},
%   H.-D. Nuhn \emph{et al.},
   \textquotedblleft{Commissioning of the Delta Polarizing Undulator at LCLS}\textquotedblright,
%  in \emph{Proc. FEL2015}, WED01, pp. 757--763,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper WED01, pp. 757--763,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper WED01, pp. 757--763,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/wed01.pdf},
    doi:10.18429/JACoW-FEL2015-WED01, 2015.