- Author: Philip Ackermann
- Language: German
- Year: 2023
- Author: Philip Ackermann
- Language: German
- Year: 2018
- Author: Philip Ackermann
- Language: English
- Year: 2023
- Author: Philip Ackermann
- Language: English
- Year: 2022
- Author: Philip Ackermann
- Language: English
- Year: 2022
- Author: Philip Ackermann
- Language: German
- Year: 2019
- Author: Philip Ackermann
- Language: German
- Year: 2013