- Author: Pietra Palazzolo, Michael Springer, Stephen Butler
- Language: English
- Year: 2019
- Author: Pietra Palazzolo Michael Springer Stephen Butler
- Language: English
- Year: 2019
- Author: Michael Springer
- Language: German
- Year: 2019
- Author: Michael Springer (auth.)
- Language: German
- Year: 2017
- Author: Michael Springer
- Language: German
- Year: 1979
- Author: Michael Springer
- Language: German
- Year: 1979