Instant replay: How the NFL left soccer in the dark
NFL replay reviews, challenges drop with new rules and tech - ESPN
Art McNally GameDay Central
Saints-Rams referee controversy: NFL will consider rule changes to make pass interference calls subject to instant replay review - Niners Nation
MLB 2014: How Will Baseball's Instant Replay Work? - WSJ
Impact of Television NFL Football Operations
Why NFL's expanded instant replay is step in right direction – The Denver Post
Instant Replay: What stood out for Falcons in Sunday's contest vs. Saints
Mara says replay reviews eventually could be conducted in command center - NBC Sports
How instant replay impacts the psyche and performance of officials