Why NFL's expanded instant replay is step in right direction – The Denver Post
Bill Belichick asks a legitimate question: Why can't we challenge everything? - Sports Illustrated
Has The NFL's Instant Replay Run Its Course?
NFL rule changes: Modified instant replay, more positions allowed to wear single-digit jerseys - The Washington Post
Fox's Pereira knows pressure Super Bowl officials are facing
NFL rumors: Referees from Raiders-Bengals will sit rest of playoffs after botching call on Joe Burrow TD
Centralized instant replay on the way for NFL - Newsday
Behind the scenes at the NFL's new replay review center in New York - Sports Illustrated
NFL considering making referees fulltime
History of Instant Replay
NFL medical staff and referees will use Microsoft Surface tablet on the sidelines this season – GeekWire