[n] F. Hellberg et al., “Characterization and Fiducialization of the XFEL Undulator Quadrupoles”, in Proc. FEL'09, Liverpool, UK, Aug. 2009, paper WEPC15, pp. 530-533.
%\cite{Hellberg:FEL09-WEPC15} \bibitem{Hellberg:FEL09-WEPC15} F. Hellberg \emph{et al.}, \textquotedblleft{Characterization and Fiducialization of the XFEL Undulator Quadrupoles}\textquotedblright, in \emph{Proc. FEL’09}, Liverpool, UK, Aug. 2009, paper WEPC15, pp. 530--533.
@inproceedings{hellberg:fel09-wepc15, author = {F. Hellberg and others}, title = {{Characterization and Fiducialization of the XFEL Undulator Quadrupoles}}, booktitle = {Proc. FEL'09}, pages = {530--533}, paper = {WEPC15}, venue = {Liverpool, UK, Aug. 2009}, publisher = {JACoW Publishing, Geneva, Switzerland}, url = {https://jacow.org/FEL2009/papers/WEPC15.pdf}, language = {english} }