No momentum for big instant replay rule changes – Football Zebras
Overreactions from Steelers Nation: NFL officiating and how to fix it - Steel City Underground
Replay review in gridiron football - Wikipedia
NFL's instant replay officials have new powers, but owners weren't interested in other major rules changes - The Boston Globe
On Further Review, the NFL's Instant Replay is Finally Instant
On Further Review, the NFL's Instant Replay is Finally Instant
History of Instant Replay
The NFL has an instant replay camera problem
Upon further review – Instant replay works
Which sport has the worst instant replay system? An investigation
Has The NFL's Instant Replay Run Its Course?