Replay Assistance Rule NFL Football Operations
NFL officiating, replay review in good hands with Al Riveron
NFL's replay center behind the scenes: How league tackles close calls
NFL rule changes: Modified instant replay, more positions allowed to wear single-digit jerseys - The Washington Post
History of Instant Replay
NFL to consider radical replay question: Should coaches be allowed to challenge every single play?
Behind the scenes at the NFL's new replay review center in New York - Sports Illustrated
NFL's behind-the-scenes Super Bowl: Tech-savvy crowd vs. old guard
NFL officiating at crisis point, but answers remain elusive
NFL Replay Officials NFL Football Operations