History of Instant Replay
NFL making significant changes to concussion protocol - ESPN
NFL instant replay review changes expected to speed up process - Sports Illustrated
NFL Replay Officials NFL Football Operations
Has NFL found answer to fewer challenges with 'replay assistance'?
Behind-the-scenes with NFL sideline technology: Microsoft and Bose power team communication – GeekWire
Replay review in gridiron football - Wikipedia
NFL will partner with Hawk-Eye to enhance instant replay capabilities and shorten delays
NFL Taking Steps to Improving Fan Experience with Under-the-Hood Referee Replays, News, Scores, Highlights, Stats, and Rumors