1. AdWordsRep: Top position? Impossible? In: Search Engine Watch Forums. http://forums.searchenginewatch.com/showthread.php?t=2952 (2004). Cited 9 Apr 2007
2. Anderson C The long tail. Wired 12(10). http://www.wired.com/wired/archive/12.10/tail.html (2004). Cited 9 Apr 2007
3. Arnold S In search of clicks that make cash: three search companies are all chasing the same pool of advertising spend. World Information Review (1 Apr 2003)
4. Associated Press v. United States, 326 U.S. 1, US Supreme Court (1945)
5. Bagdikian B (1992) The media monopoly, 4th edn Beacon Press, Boston