- Author: Jürgen Rettinger Silvia Schwarz Wolfgang Schwarz
- Language: English
- Year: 2022
- Author: Jürgen Rettinger Silvia Schwarz Wolfgang Schwarz
- Language: German
- Year: 2018
- Author: Jürgen Rettinger Silvia Schwarz Wolfgang Schwarz (auth.)
- Language: English
- Year: 2016