[n] B. Steffen et al., “Electro-Optical Bunch Length Detection at the European XFEL”, in Proc. FEL'19, Hamburg, Germany, Aug. 2019, pp. 360-363. doi:10.18429/JACoW-FEL2019-WEP015
%\cite{Steffen:FEL19-WEP015} \bibitem{Steffen:FEL19-WEP015} B. Steffen \emph{et al.}, \textquotedblleft{Electro-Optical Bunch Length Detection at the European XFEL}\textquotedblright, in \emph{Proc. FEL’19}, Hamburg, Germany, Aug. 2019, pp. 360--363. \url{doi:10.18429/JACoW-FEL2019-WEP015}
@inproceedings{steffen:fel19-wep015, author = {B. Steffen and others}, title = {{Electro-Optical Bunch Length Detection at the European XFEL}}, booktitle = {Proc. FEL'19}, pages = {360--363}, paper = {WEP015}, venue = {Hamburg, Germany, Aug. 2019}, publisher = {JACoW Publishing, Geneva, Switzerland}, doi = {10.18429/JACoW-FEL2019-WEP015}, url = {https://jacow.org/fel2019/papers/WEP015.pdf}, language = {english} }