* Ostwald, M. ''Oligarchia: The Development of a Constitutional Form in Ancient Greece (''Historia'' Einzelschirften; 144)''. Stuttgart: Steiner, 2000 (ISBN 3-515-07680-8).
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== แหล่งข้อมูลอื่น ==
* Online Text: Leonard Whibley, [http://www.isidore-of-seville.com/al/oligarchies/index.html ''Greek Oligarchies: Their Character and Organisation''] {{Webarchive|url=https://web.archive.org/web/20050312233353/http://www.isidore-of-seville.com/al/oligarchies/index.html |date=2005-03-12 }} (1869), still the only full-scale treatment of oligarchy in Classical Greece.
* M Hollingsworth and S Lansley, Londongrad, From Russia With Cash, 2009, 4th Estate
