FOOTBALL; Instant Replay Goes the Way of the Single Wing - The New York Times
MLB 2014: How Will Baseball's Instant Replay Work? - WSJ
Report: League installing real-time fiber optics for replay review - NBC Sports
Dec. 7, 1963: Video Instant Replay Comes to TV
Canzano: How the Pac-12 went awry with football officiating
The NFL's 3 changes under the hood of replay that could have mixed results – Football Zebras
History of Instant Replay
Will NFL finally fix the catch rule? - NBC Sports
How NFL replay reviews are changing: R.I.P 'hood,' hello tablet - ESPN - NFL Nation- ESPN
NFL makes pass-interference calls (and noncalls) reviewable - Los Angeles Times
How instant replay is ruining professional sports, one coach's challenge at a time