Has NFL found answer to fewer challenges with 'replay assistance'?
A look inside the NHL's replay war room. Can it work in the NFL?
NFL's replay center behind the scenes: How league tackles close calls
History of Instant Replay
Behind the scenes at the NFL's new replay review center in New York - Sports Illustrated
On Further Review, the NFL's Instant Replay is Finally Instant
NFL Replay Rules Remain Problem For Officials
After Further Review: How Did the Offense Get to This Point, and Where Do the Patriots Go From Here?
Behind the scenes at the NFL's new replay review center in New York - Sports Illustrated
MLB's expanded instant replay needs to be reviewed - Los Angeles Times
Behind the scenes at the NFL's new replay review center in New York - Sports Illustrated
On Further Review, the NFL's Instant Replay is Finally Instant
NFL Officials: Preparing for Success
NFL Notes: Rookie Gonzalez impresses out of the gate