History of Instant Replay
NFL's instant replay officials have new powers, but owners weren't interested in other major rules changes - The Boston Globe
NFL announces major rule changes which will make games last even longer - Mirror Online
NFL teams propose 15 rule changes, including to replay review - ESPN
Key NFL rule changes for 2023: One date for preseason roster reductions, players other than offensive and defensive linemen can now wear the number zero, and more
NFL teams propose 15 rule changes, including to replay review - ESPN
NFL Announces 2023 Rule Changes; Chargers Get Proposal Passed by Owners
Potential NFL rule changes proposed for the 2023 season - Behind the Steel Curtain
NFL replay rules could reportedly change dramatically in 2021
Several NFL Teams Propose Rule Changes To Add More Instant Replay
NFL Rule Change: Officials Now Able To Replay Failed Fourth Down Attempts
The Rule Changes We'd Make to Improve the NFL - The Ringer
2023 NFL overtime rules: Regular season vs playoffs
United States Football League - Wikipedia