[n] V. Vogel et al., “Status of the Klystrons for the European XFEL after Commissioning and First User Operation Phase”, in Proc. FEL'19, Hamburg, Germany, Aug. 2019, pp. 420-422. doi:10.18429/JACoW-FEL2019-WEP045
%\cite{Vogel:FEL19-WEP045} \bibitem{Vogel:FEL19-WEP045} V. Vogel \emph{et al.}, \textquotedblleft{Status of the Klystrons for the European XFEL after Commissioning and First User Operation Phase}\textquotedblright, in \emph{Proc. FEL’19}, Hamburg, Germany, Aug. 2019, pp. 420--422. \doi{10.18429/JACoW-FEL2019-WEP045}
@inproceedings{vogel:fel19-wep045, author = {V. Vogel and others}, title = {{Status of the Klystrons for the European XFEL after Commissioning and First User Operation Phase}}, booktitle = {Proc. FEL'19}, pages = {420--422}, paper = {WEP045}, venue = {Hamburg, Germany, Aug. 2019}, publisher = {JACoW Publishing, Geneva, Switzerland}, doi = {10.18429/JACoW-FEL2019-WEP045}, url = {https://jacow.org/fel2019/papers/WEP045.pdf}, language = {english} }