- Author: Massimo Adinolfi, Ottavio Di Grazia, Giannino Di Tommaso, Santiago Kovadloff, Gaetano Licata, Leo Lugarini, Roberto Morani, Stephan Otto, Giuseppe Razzino, Vincenzo Vitiello
- Language: Italian
- Year: 2021
- Author: Stephan Otto
- Language: German
- Year: 2019
- Author: Joseph Ratzinger Stephan Otto Horn (editor) Vinzenz Pfnur (editor)
- Language: English
- Year: 2005
- Author: Stephan Otto
- Language: German
- Year: 2007
- Author: Klaus-Stephan Otto Thomas Speck
- Language: German
- Year: 2010