EXA 2011 Proceedings of the International Conference on Exotic Atoms and Related Topics (EXA 2011) held in Vienna, Austria, September 5-9, 2011 - Bühler, Paul; Hartmann, Olaf; Marton, Johann; Suzuki, Ken; Widmann, Eberhard; Zmeskal, Johann (Springer Netherlands : Imprint: Springer, 2012)