- Author: Silke Scheerer Dirk Proske (auth.)
- Language: German
- Year: 2008
- Author: Dirk Proske (auth.)
- Language: English
- Year: 2018
- Author: Silke Scheerer Dirk Proske (auth.)
- Language: German
- Year: 2008
- Author: Silke Scheerer Dirk Proske (auth.)
- Language: German
- Year: 2008
- Author: Dirk Proske (auth.)
- Language: English
- Year: 2008