[n] J. W. Butler, J. M. Cook, and S. A. Zawadzki, “Improvements in Trim Code for Magnet Design”, in Proc. PAC'71, Chicago, IL, USA, Mar. 1971, pp. 875-878.
%\cite{Butler:PAC71} \bibitem{Butler:PAC71} J. W. Butler, J. M. Cook, and S. A. Zawadzki, \textquotedblleft{Improvements in Trim Code for Magnet Design}\textquotedblright, in \emph{Proc. PAC’71}, Chicago, IL, USA, Mar. 1971, pp. 875--878.
@inproceedings{butler:pac71, author = {J. W. Butler and J. M. Cook and S. A. Zawadzki}, title = {{Improvements in Trim Code for Magnet Design}}, booktitle = {Proc. PAC'71}, pages = {875--878}, paper = {}, venue = {Chicago, IL, USA}, series = {Particle Accelerator Conference}, number = {4}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {6}, year = {1971}, language = {english} }