[n] U. Ratzinger, “Interdigital RF Structures”, in Proc. LINAC'90, Albuquerque, NM, USA, Sep. 1990, paper WE201, pp. 525-529.
%\cite{Ratzinger:LINAC90-WE201} \bibitem{Ratzinger:LINAC90-WE201} U. Ratzinger, \textquotedblleft{Interdigital RF Structures}\textquotedblright, in \emph{Proc. LINAC’90}, Albuquerque, NM, USA, Sep. 1990, paper WE201, pp. 525--529.
@inproceedings{ratzinger:linac90-we201, author = {U. Ratzinger}, title = {{Interdigital RF Structures}}, booktitle = {Proc. LINAC'90}, pages = {525--529}, paper = {WE201}, venue = {Albuquerque, NM, USA, Sep. 1990}, series = {Linear Accelerator Conference}, publisher = {JACoW Publishing, Geneva, Switzerland}, url = {https://jacow.org/l90/papers/WE201.pdf}, language = {english} }