[n] W. Leemans et al., “Experimental Progress on a 1 GeV Laser Accelerator at LBNL”, presented at the PAC'05, Knoxville, TN, USA, May 2005, paper TPAE019, unpublished.
%\cite{Leemans:PAC05-TPAE019} \bibitem{Leemans:PAC05-TPAE019} W. Leemans \emph{et al.}, \textquotedblleft{Experimental Progress on a 1 GeV Laser Accelerator at LBNL}\textquotedblright, presented at the PAC’05, Knoxville, TN, USA, May 2005, paper TPAE019, unpublished.
@unpublished{leemans:pac05-tpae019, author = {W. Leemans and others}, title = {{Experimental Progress on a 1 GeV Laser Accelerator at LBNL}}, booktitle = {Proc. PAC'05}, paper = {TPAE019}, venue = {Knoxville, TN, USA, May 2005}, intype = {presented at the}, series = {Particle Accelerator Conference}, number = {21}, publisher = {JACoW Publishing, Geneva, Switzerland}, url = {https://jacow.org/p05/papers/TPAE019.pdf}, note = {presented at PAC'05, Knoxville, TN, USA, May 2005, paper TPAE019, unpublished}, language = {english} }