Hawk-Eye NFL Football Operations
NFL owners approve instant-replay review of pass interference, including on non-calls - The Washington Post
NFL admits to breakdown in instant replay process
Denver Broncos vs. Miami Dolphins officiating breakdown for Week 3 - Mile High Report
The BIGGEST INSTANT REPLAY CONTROVERSY in Monday Night Football HISTORY
Tech: A closer look at the NFL's instant replay camera work
NFL Notes: Defense changes the script
The NFL has an instant replay camera problem
Super Bowl XLVIII: Slow-motion instant replays mislead us about what happens in a football game.