History of Instant Replay
Instant replay under review next week: NFL Newswatch
How the NFL plans to overhaul instant replay in 2020, and who could oversee the transition
The Invention of Instant Replay Lemelson Center for the Study of Invention and Innovation
Instant Replay: What stood out for Falcons in Sunday's contest vs. Saints
Overreactions from Steelers Nation: NFL officiating and how to fix it - Steel City Underground
Replay in sports: Ranking the systems from best to worst
The NFL has an instant replay camera problem
Instant Replay Game: 25 years later
How instant replay is ruining professional sports, one coach's challenge at a time
History of Instant Replay
NFL replay reviews, challenges drop with new rules and tech - ESPN
On Further Review, the NFL's Instant Replay is Finally Instant