[n] J. B. Flanz, “Symmetry Corrected Second Order Achromat”, in Proc. PAC'89, Chicago, IL, USA, Mar. 1989, pp. 1349-1352.
%\cite{Flanz:PAC89} \bibitem{Flanz:PAC89} J. B. Flanz, \textquotedblleft{Symmetry Corrected Second Order Achromat}\textquotedblright, in \emph{Proc. PAC’89}, Chicago, IL, USA, Mar. 1989, pp. 1349--1352.
@inproceedings{flanz:pac89, author = {J. B. Flanz}, title = {{Symmetry Corrected Second Order Achromat}}, booktitle = {Proc. PAC'89}, pages = {1349--1352}, paper = {}, venue = {Chicago, IL, USA, Mar. 1989}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }