- Author: Peter Bernholz Roland Vaubel (eds.)
- Language: English
- Year: 2014
- Author: Peter Bernholz Roland Vaubel
- Language: English
- Year: 2014
- Author: Peter Bernholz, Roland Vaubel, Egon-Sohmen-Foundation
- Language: English
- Year: 2007
- Author: Peter Bernholz Roland Vaubel
- Language: English
- Year: 2004
- Author: Peter Bernholz Roland Vaubel
- Language: English
- Year: 2007