[n] E. Regenstreif, “Phase Space Acceptance of a Quadrupole Doublet Analytic Expressions and Numerical Results”, in Proc. LINAC'68, Long Island, NY, USA, May 1968, paper E-5, pp. 353-356.
%\cite{Regenstreif:LINAC68-E-5} \bibitem{Regenstreif:LINAC68-E-5} E. Regenstreif, \textquotedblleft{Phase Space Acceptance of a Quadrupole Doublet Analytic Expressions and Numerical Results}\textquotedblright, in \emph{Proc. LINAC’68}, Long Island, NY, USA, May 1968, paper E--5, pp. 353--356.
@inproceedings{regenstreif:linac68-e-5, author = {E. Regenstreif}, title = {{Phase Space Acceptance of a Quadrupole Doublet Analytic Expressions and Numerical Results}}, booktitle = {Proc. LINAC'68}, pages = {353--356}, paper = {E-5}, venue = {Long Island, NY, USA, May 1968}, series = {Linear Accelerator Conference}, publisher = {JACoW Publishing, Geneva, Switzerland}, url = {https://jacow.org/l68/papers/E-5.pdf}, language = {english} }