[n] W. Namkung et al., “Progress of PLS 2-GeV Linac”, in Proc. PAC'93, Washington D.C., USA, Mar. 1993, pp. 581-584.
%\cite{Namkung:PAC93} \bibitem{Namkung:PAC93} W. Namkung \emph{et al.}, \textquotedblleft{Progress of PLS 2-GeV Linac}\textquotedblright, in \emph{Proc. PAC’93}, Washington D.C., USA, Mar. 1993, pp. 581--584.
@inproceedings{namkung:pac93, author = {W. Namkung and others}, title = {{Progress of PLS 2-GeV Linac}}, booktitle = {Proc. PAC'93}, pages = {581--584}, paper = {}, venue = {Washington D.C., USA, Mar. 1993}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }