[n] P. Sprangle et al., “Optical Guiding of Short Intense Laser Pulses in Plasmas for GeV Electron Acceleration”, presented at the PAC'01, Chicago, IL, USA, Jun. 2001, paper MOPC012, unpublished.
%\cite{Sprangle:PAC01-MOPC012} \bibitem{Sprangle:PAC01-MOPC012} P. Sprangle \emph{et al.}, \textquotedblleft{Optical Guiding of Short Intense Laser Pulses in Plasmas for GeV Electron Acceleration}\textquotedblright, presented at the PAC’01, Chicago, IL, USA, Jun. 2001, paper MOPC012, unpublished.
@unpublished{sprangle:pac01-mopc012, author = {P. Sprangle and others}, title = {{Optical Guiding of Short Intense Laser Pulses in Plasmas for GeV Electron Acceleration}}, booktitle = {Proc. PAC'01}, paper = {MOPC012}, venue = {Chicago, IL, USA, Jun. 2001}, intype = {presented at the}, publisher = {JACoW Publishing, Geneva, Switzerland}, note = {presented at PAC'01, Chicago, IL, USA, Jun. 2001, paper MOPC012, unpublished}, language = {english} }