- Author: Wassermann Hendrik, Ooyen Robert Chr. van
- Language: German
- Year: 2018
- Author: Bull Hans Peter, Ooyen Robert Chr. van, Wassermann Hendrik
- Language: German
- Year: 2022
- Author: Ooyen Robert Chr. van, Wassermann Hendrik
- Language: German
- Year: 2021
- Author: Lepsius Oliver, Ooyen Robert Chr. van, Wassermann Hendrik
- Language: German
- Year: 2020
- Author: Gusy Christoph, Ooyen Robert Chr. van, Wassermann Hendrik
- Language: German
- Year: 2018