- Author: Wolfgang Müller-Funk (editor), Clemens Ruthner (editor)
- Language: English
- Year: 2017
- Author: Wolfgang Müller-Funk (editor), Clemens Ruthner (editor)
- Language: English
- Year: 2017
- Author: Günther Martens Clemens Ruthner Jaak De Vos (Hrsg.)
- Language: German
- Year: 1995
- Author: Clemens Ruthner, Diana Reynolds Cordileone, Ursula Reber, Raymond Detrez
- Language: English
- Year: 2015