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%\cite{Aulenbacher:COOL2017-TUM23}
\bibitem{Aulenbacher:COOL2017-TUM23}
K. Aulenbacher,
\textquotedblleft{Status of the Turbine Concept for Relativistic Electron Coolers}\textquotedblright,
presented at COOL2017, Bonn, Germany, Sep. 2017, paper TUM23, unpublished.
% presented at the 11th Workshop on Beam Cooling and Related Topics (COOL'17), Bonn, Germany, Sep. 2017, paper TUM23, unpublished.