- Author: Wilensky Harold L
- Language: English
- Year: 2003
- Author: Frank Robert
- Language: English
- Year: 2007
- Author: Löhle Philipp
- Language: German
- Year: 2015
- Author: Rolf David
- Language: English
- Year: 2016
- Author: Hacker Jacob S, Pierson Paul
- Language: English
- Year: 2016
- Author: Roger E.A. Farmer
- Language: English
- Year: 2017
- Author: Darwall Stephen L
- Language: English
- Year: 2002
- Author: Ridley Matt
- Language: English
- Year: 2010