[n] P. G. O, J. E. Dyson, R. G. Maggs, P. Schafstall, and T. J. Zaugg, “Variable Gradient Permanent-Magnet Quadrupole Lenses”, in Proc. PAC'89, Chicago, IL, USA, Mar. 1989, pp. 354-357.
%\cite{PGO:PAC89} \bibitem{PGO:PAC89} P. G. O, J. E. Dyson, R. G. Maggs, P. Schafstall, and T. J. Zaugg, \textquotedblleft{Variable Gradient Permanent-Magnet Quadrupole Lenses}\textquotedblright, in \emph{Proc. PAC’89}, Chicago, IL, USA, Mar. 1989, pp. 354--357.
@inproceedings{pgo:pac89, author = {P. G. O and J. E. Dyson and R. G. Maggs and P. Schafstall and T. J. Zaugg}, title = {{Variable Gradient Permanent-Magnet Quadrupole Lenses}}, booktitle = {Proc. PAC'89}, pages = {354--357}, paper = {}, venue = {Chicago, IL, USA, Mar. 1989}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }