- Author: Fischer Katharina D. L.
- Language: German
- Year: 2017
- Author: Frank Fischer Katharina Golubkow (auth.)
- Language: German
- Year: 2010
- Author: Frank Fischer Katharina Golubkow (auth.)
- Language: German
- Year: 2009
- Author: Frank Fischer Katharina Fischer (auth.)
- Language: German
- Year: 2012
- Author: Frank Fischer Katharina Fischer (auth.)
- Language: German
- Year: 2014
- Author: Frank Fischer Katharina Fischer (auth.)
- Language: German
- Year: 2014
- Author: Frank Fischer Katharina Golubkow (auth.)
- Language: German
- Year: 2009
- Author: Frank Fischer Katharina Golubkow
- Language: German
- Year: 2010
- Author: Frank Fischer Katharina Golubkow
- Language: German
- Author: Frank Fischer Katharina Golubkow
- Language: German
- Year: 2010