- Author: Pfarr Heide M.
- Language: German
- Year: 1972
- Author: Möller Kim
- Language: German
- Year: 2001
- Author: Moll Wilhelm
- Language: German
- Year: 1977
- Author: Matusiewicz David, Wasem Jürgen
- Language: German
- Year: 2014
- Author: Maier Kurt
- Language: German
- Year: 1969