[n] D. A. Herrup et al., “Time-Varying Sextupole Corrections During the Tevatron Ramp”, in Proc. PAC'89, Chicago, IL, USA, Mar. 1989, pp. 518-521.
%\cite{Herrup:PAC89} \bibitem{Herrup:PAC89} D. A. Herrup \emph{et al.}, \textquotedblleft{Time-Varying Sextupole Corrections During the Tevatron Ramp}\textquotedblright, in \emph{Proc. PAC’89}, Chicago, IL, USA, Mar. 1989, pp. 518--521.
@inproceedings{herrup:pac89, author = {D. A. Herrup and others}, title = {{Time-Varying Sextupole Corrections During the Tevatron Ramp}}, booktitle = {Proc. PAC'89}, pages = {518--521}, paper = {}, venue = {Chicago, IL, USA, Mar. 1989}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }