
- Author: Arthur Asa Berger
- Language: English
- Year: 2019

- Author: Tony Costa
- Language: English
- Year: 2013

- Author: Oliver Wehr
- Language: German
- Year: 2015

- Author: Dowlasz Barbara Dowlasz
- Language: German
- Year: 2016

- Author: María Elisa Sala
- Language: Spanish, Castilian
- Year: 2015

- Author: Michael B. Shepherd
- Language: English
- Year: 2013

- Author: Pfisterer Chiara Pfisterer
- Language: German
- Year: 2018