- Author: Konrad Schmid
- Language: German
- Year: 2021
- Author: Konrad Schmid
- Language: German
- Year: 2021
- Author: Konrad Schmid, Jens Schröter, Peter Lewis
- Language: English
- Year: 2021
- Author: Konrad Schmid
- Language: English
- Year: 2010
- Author: Konrad Schmid, Peter Altmann
- Language: English
- Year: 2015
- Author: Konrad Schmid
- Language: German
- Year: 2011