- Author: Eric W. Baker, Michael Schuenke, Erik Schulte, Udo Schumacher, Markus Voll
- Language: English
- Year: 2015
- Author: Michael Schuenke Erik Schulte Udo Schumacher Lawrence M Ross Edward D Lamperti Markus Voll
- Language: English
- Year: 2010
- Author: Michael Schünke Erik Schulte Udo Schumacher Markus Voll Karl Wesker
- Language: German
- Year: 2005