L'oper raccoglie i contributi di :Pál Ács, Matteo Al Kalak, Heinrich Assel, Jordan J. Ballor, Jon Balserak, Judith Becker, Christopher M. Bellitto, Lucio Biasiori, André Birmelé, Roland Boer, Giampiero Brunelli, Pierre Bühler, Johannes Burkhardt, Euan Cameron, Mauro Casadei Turroni Monti, Michela Catto, Christophe Chalamet, Christopher W. Close, Gabriella Cotta, Otfried Czaika, Wietse de Boer, Mariano Delgado, Patrizio Foresta, Günter Frank, Enrico Galavotti, Antonio Gerace, Thomas Hahn- Bruckart, Christine Helmer, Enrique García Hernán, Freerk Heule, Thomas Albert Howard, Marco Iacovella, Girolamo Imbruglia, Daniel Jeyaraj, Billy Kristanto, Volker Leppin, Michele Lodone, Alberto Melloni, Gregory J. Miller, Guido Mongini, Franco Motta, Silvana Nitti, Johannes Oeldemann, Bradley A. Peterson, Franz Posset, Helmut Puff, Richard Rex, Paolo Ricca, Rady Roldán-Figueroa, Sergio Rostagno, Giovanni Rota, Wolf-Friedrich Schäufele, Luise Schorn-Schütte, Brooks Schramm, Jörg Seiler, Herman J. Selderhuis, Violet Soen, James M. Stayer, Kirsi Stjerna, Fulvio Tessitore, Jonathan D. Trigg, Lothar Vogel, Günter Vogler, Peter Walter, Maria Lucia Weigel, Roni Weinstein, Ulrich Andreas Wien, Sarah Hinlicky Wilson, Esther P. Wipfler, Marcin Wislocki, Federico Zuliani.