- Author: Bernhard Korte Jens Vygen (auth.)
- Language: German
- Year: 2008
- Author: Bernhard Korte Jens Vygen (auth.)
- Language: German
- Year: 2012
- Author: Bernhard Korte Jens Vygen (auth.)
- Language: English
- Year: 2002
- Author: Bernhard Korte Jens Vygen (auth.)
- Language: English
- Year: 2008
- Author: Bernhard Korte Jens Vygen (auth.)
- Language: English
- Year: 2000
- Author: Bernhard Korte Jens Vygen (auth.)
- Language: English
- Year: 2012
- Author: Bernhard Korte Jens Vygen (auth.)
- Language: English
- Year: 2012
- Author: Bernhard Korte Jens Vygen (auth.)
- Language: English
- Year: 2012
- Author: Bernhard Korte Jens Vygen (auth.)
- Language: Italian
- Year: 2011
- Author: Bernhard Korte Jens Vygen (auth.)
- Language: English
- Year: 2008