NFL rule changes: Modified instant replay, more positions allowed to wear single-digit jerseys - The Washington Post
NFL replay reviews, challenges drop with new rules and tech - ESPN
Play it again: NFL fans get 360-degree instant replay: Digital Photography Review
History of Instant Replay
Overreactions from Steelers Nation: NFL officiating and how to fix it - Steel City Underground
Joe Starkey: Maybe Dan Rooney was right the first time on NFL replay
The Invention of Instant Replay Lemelson Center for the Study of Invention and Innovation
Not-so-instant replay: Eagles need TD oddy reviewed twice
History of Instant Replay
The 5 O'Clock Club: How instant replay is killing the NFL - Hogs Haven
The NFL has an instant replay camera problem
After Further Review: Kicking off the Denver Broncos season - Mile High Report
The NFL has an instant replay camera problem
Brutal instant replay shows how insufferable sports have become