PBS
Pbs Frontline: The Columbian Cartels
This article describes some of the world's most well-known cartels, the Columbian drug cartels.
Wikimedia
Wikipedia: Cartel
This on-line encyclopedia provides the legal definition and examples of a cartel.
Other
Antitrust Report: Department of Justice Amnesty Program Takes Another Turn
This article looks at whether, once a company or individual has been offered amnesty in cases such as price fixing or collusion, can the Justice Department reverse their offer of amnesty? (4/1/2005)
Khan Academy
Khan Academy: Game Theory
Practice what you have learned about finding Nash equilibrium, dominant strategies, and cartel outcomes in this exercise.
Wikimedia
Wikipedia: Collusion
Provides a definition and many examples of collusion, along with obstacles facing a successful collusive agreement.