- Author: Klaus Erlach
- Language: German
- Year: 2020
- Author: Klaus Erlach (auth.)
- Language: German
- Year: 2010
- Author: Klaus Erlach (auth.)
- Language: English
- Year: 2013
- Author: Klaus Erlach
- Language: German
- Year: 2008
- Author: Klaus Erlach
- Language: German
- Year: 2008
- Author: Klaus Erlach (auth.)
- Language: German
- Year: 2010