[n] P. W. Allison, “A Direct Extraction H- Ion Source”, in Proc. PAC'77, Chicago, IL, USA, Mar. 1977, pp. 1594-1597.
%\cite{Allison:PAC77} \bibitem{Allison:PAC77} P. W. Allison, \textquotedblleft{A Direct Extraction H<sup>-</sup> Ion Source}\textquotedblright, in \emph{Proc. PAC’77}, Chicago, IL, USA, Mar. 1977, pp. 1594--1597.
@inproceedings{allison:pac77, author = {P. W. Allison}, title = {{A Direct Extraction H<sup>-</sup> Ion Source}}, booktitle = {Proc. PAC'77}, pages = {1594--1597}, paper = {}, venue = {Chicago, IL, USA, Mar. 1977}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }