- Author: Christian Krüger
- Language: German
- Year: 2021
- Author: Becker Christian, Krüger Michael, Nielsen Stefan
- Language: English
- Year: 2015
- Author: Johann Christian Krüger (auth.)
- Language: German
- Year: 1970
- Author: Becker Christian, Krüger Michael, Nielsen Stefan
- Language: English, German
- Year: 2015
- Author: Becker Christian, Krüger Michael, Nielsen Stefan
- Language: English, German
- Year: 2015