NFL assembles all-Black officiating crew for first time – The Denver Post
NFL head of officiating Dean Blandino resigns
For ACC and power conferences, off-site help on football replay reviews is now essential
NFL creates new officiating post: VP of replay and administration – Football Zebras
NFL May Soon Split Instant Replay Decisions Between NYC and LA
Surface tablets for officiating reviews takes hold in NFL
We're not perfect, but we're working at it': An inside look at the Big 12's Replay Operations Center
NFL will open season with replacement officials
Replay Assistance Rule NFL Football Operations
NFL refs roster includes 1st female instant replay official
Wires and gadgets are part of the NFL official's uniform – Football Zebras
NFL Releases Full List of Competition Committee's 2020 Rule Proposals, News, Scores, Highlights, Stats, and Rumors
Even before kickoff, referees to make history in the Super Bowl
Mike Brown expresses concerns over NFL replay expansion
Replay review in gridiron football - Wikipedia