- Author: Johan Leemans (editor) Peter Van Nuffelen (editor) Shawn W. J. Keough (editor)
- Language: English, German
- Year: 2011
- Author: Joachim Mehlhausen
- Language: German
- Year: 1999
- Author: Heinz-Gerhard Justenhoven (editor) William A. Barbieri Jr. (editor)
- Language: English
- Year: 2012
- Author: Harry Oelke
- Language: German
- Year: 1992
- Author: Wendy Mayer (editor) Bronwen Neil (editor)
- Language: English
- Year: 2013