[n] J. Bahrdt et al., “Performance of the PETRA III APPLE II Undulator”, in Proc. IPAC'11, San Sebastian, Spain, Sep. 2011, paper THPC156, pp. 3254-3256.
%\cite{Bahrdt:IPAC11-THPC156} \bibitem{Bahrdt:IPAC11-THPC156} J. Bahrdt \emph{et al.}, \textquotedblleft{Performance of the PETRA III APPLE II Undulator}\textquotedblright, in \emph{Proc. IPAC’11}, San Sebastian, Spain, Sep. 2011, paper THPC156, pp. 3254--3256.
@inproceedings{bahrdt:ipac11-thpc156, author = {J. Bahrdt and others}, title = {{Performance of the PETRA III APPLE II Undulator}}, booktitle = {Proc. IPAC'11}, pages = {3254--3256}, paper = {THPC156}, venue = {San Sebastian, Spain}, series = {International Particle Accelerator Conference}, number = {2}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {9}, year = {2011}, isbn = {978-9-29-083366-6}, url = {https://jacow.org/IPAC2011/papers/THPC156.pdf}, language = {english} }