NFL Notes: Defense changes the script
History of Instant Replay
Inside the Problematic New Pass Interference Replay Rule - The Ringer
Has The NFL's Instant Replay Run Its Course?
Eagles 31, 49ers 7: NFC Championship Game instant analysis
History of Instant Replay
Replay referee given more influence in 2021 NFL season - CGTN
Scoring Plays NFL Football Operations
Winners and Losers of NFL Week 15 - The Ringer
The NFL has an instant replay camera problem
NFL will consider instant replay changes, but 'sky judge' remains unlikely - The Washington Post