How did Super Bowl commercials become such a big deal?
The Origin of Super Bowl Ads—And How They Conquered the Game
Why the Super Bowl defies the decline of TV advertising
Explainer: The evolution of Super Bowl ads - Sportcal
2009 California Football Information Guide by Cal Media Relations
The Business of the Super Bowl - Sportcal
Ambush Marketing Is Dead, Long Live Ambush Marketing
Super Bowl ads history: What they cost, why they're popular
The Evolution of Super Bowl Ads: A Brief History
Super Bowl Commercials - The Stats at Stake - AMA Philadelphia
Why the Super Bowl defies the decline of TV advertising