[n] E. Willen et al., “Magnetic Properties of ISABELLE Superconducting Quadrupoles”, in Proc. PAC'81, Washington D.C., USA, Mar. 1981, pp. 3300-3303.
%\cite{Willen:PAC81} \bibitem{Willen:PAC81} E. Willen \emph{et al.}, \textquotedblleft{Magnetic Properties of ISABELLE Superconducting Quadrupoles}\textquotedblright, in \emph{Proc. PAC’81}, Washington D.C., USA, Mar. 1981, pp. 3300--3303.
@inproceedings{willen:pac81, author = {E. Willen and others}, title = {{Magnetic Properties of ISABELLE Superconducting Quadrupoles}}, booktitle = {Proc. PAC'81}, pages = {3300--3303}, paper = {}, venue = {Washington D.C., USA, Mar. 1981}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }