- Author: Karl Sommer Rudolf Heinz Jörg Schöfer
- Language: German
- Year: 2018
- Author: Karl Sommer Rudolf Heinz Jörg Schöfer (auth.)
- Language: German
- Year: 2014
- Author: Karl Sommer Rudolf Heinz Jörg Schöfer (auth.)
- Language: German
- Year: 2010
- Author: Karl Sommer Rudolf Heinz Jörg Schöfer (auth.)
- Language: German
- Year: 2010
