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Portny, Stanley E. (1) Auerswald, Janko, Portmann, Pius (2) Halliday, David (university Of Pittsburgh), Resnick, Robert (rensselaer Polytechnic Institute), Walker, Jearl (cleveland State University) (2) Maidl, Bernhard, Thewes, Markus, Maidl, Ulrich (2) Kunze, Udo R., Schwedt, Georg (universitat) (1)

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