@incollection{PickenhainWagner, author = {Pickenhain, Sabine and Wagner, M.}, title = {Optimal Control Problems with a First Order PDE System - Necessary and Sufficient Optimality Conditions}, series = {Online optimization of large scale systems}, booktitle = {Online optimization of large scale systems}, editor = {Gr{\"o}tschel, Martin}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {3-540-42459-8}, pages = {159 -- 172}, language = {en} } @incollection{HenkelSchwiertzWagneretal., author = {Henkel, Karsten and Schwiertz, Carola and Wagner, S. and Valdeig, A. and List, M. and Schmeißer, Dieter}, title = {Partikel- und Tropfendetektion im Mikrometerbereich mittels Schwingquarzen}, publisher = {w.e.b.-Univ.-Verl.}, address = {Dresden}, isbn = {3-935712-92-8}, pages = {291 -- 294}, language = {de} } @incollection{PickenhainWagner, author = {Pickenhain, Sabine and Wagner, M.}, title = {Critical points in relaxed deposit problems}, series = {Calculus of variations and optimal control, Technion 1998, proceedings of the International Conference on the Calculus of Variations and Related Topics, 25 - 31 March, 1998}, booktitle = {Calculus of variations and optimal control, Technion 1998, proceedings of the International Conference on the Calculus of Variations and Related Topics, 25 - 31 March, 1998}, editor = {Ioffe, Alexander}, publisher = {Chapman \& Hall/CRC}, address = {Boca Raton, Fla. [u.a.]}, isbn = {0-8493-0605-1}, pages = {217 -- 236}, language = {en} } @incollection{HerreJasparsWagner, author = {Herre, Heinrich and Jaspars, Jan O. M. and Wagner, Gerd}, title = {What is Negation?}, language = {en} }