Pass interference instant replay review: Why NFL scrapped it for 2020 - Sports Illustrated
Pass Interference or Not? No One in the N.F.L. Seems to Know - The New York Times
Significant replay rules changes proposed in NFL
Reviewing instant replay's controversial playoff history - ESPN
The NFL made a specific rule to review pass interference, then didn't use it on the Vikings' stunning, game-winning touchdown over the Saints
Replay review in gridiron football - Wikipedia
The NFL's New Pass Interference Replay Rule Is Going To Be Pretty Chaotic
NFL will consider changes to instant replay but sky judge appears to not be on the table - The Boston Globe
Owners make pass interference, non-calls reviewable
More Guardian Caps, And '0' On The Field
Instant Replay Review is the Furthest Thing From Instant
Rules school: What replay assist can and can't do – Football Zebras