Philipp Stieg, University of Liechtenstein, Vaduz, Liechtenstein
Wolfgang Hora, University of Liechtenstein, Vaduz, Liechtenstein
Thomas Niemand, Clausthal University of Technology, Clausthal-Zellerfeld, Germany
Sascha Kraus, University of Liechtenstein, Vaduz, Liechtenstein
Matthias Filser, University of Liechtenstein, Vaduz, Liechtenstein