[n] G. R. Swain, “Formulas for the Twiss Beam Parameters for a Matched Beam at the Entrance to a Linac”, in Proc. LINAC'90, Albuquerque, NM, USA, Sep. 1990, paper TU424, pp. 367-368.
%\cite{Swain:LINAC90-TU424} \bibitem{Swain:LINAC90-TU424} G. R. Swain, \textquotedblleft{Formulas for the Twiss Beam Parameters for a Matched Beam at the Entrance to a Linac}\textquotedblright, in \emph{Proc. LINAC’90}, Albuquerque, NM, USA, Sep. 1990, paper TU424, pp. 367--368.
@inproceedings{swain:linac90-tu424, author = {G. R. Swain}, title = {{Formulas for the Twiss Beam Parameters for a Matched Beam at the Entrance to a Linac}}, booktitle = {Proc. LINAC'90}, pages = {367--368}, paper = {TU424}, venue = {Albuquerque, NM, USA, Sep. 1990}, series = {Linear Accelerator Conference}, publisher = {JACoW Publishing, Geneva, Switzerland}, url = {https://jacow.org/l90/papers/TU424.pdf}, language = {english} }