[n] W. Hardt, “Some Crucial Problems in the Design of the Booster for the 300 GeV Synchrotron”, in Proc. PAC'69, Washington D.C., USA, Mar. 1969, pp. 963-965.
%\cite{Hardt:PAC69} \bibitem{Hardt:PAC69} W. Hardt, \textquotedblleft{Some Crucial Problems in the Design of the Booster for the 300 GeV Synchrotron}\textquotedblright, in \emph{Proc. PAC’69}, Washington D.C., USA, Mar. 1969, pp. 963--965.
@inproceedings{hardt:pac69, author = {W. Hardt}, title = {{Some Crucial Problems in the Design of the Booster for the 300 GeV Synchrotron}}, booktitle = {Proc. PAC'69}, pages = {963--965}, paper = {}, venue = {Washington D.C., USA}, series = {Particle Accelerator Conference}, number = {3}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {6}, year = {1969}, language = {english} }