Super Bowl 2021: Sarah Thomas Will Be the First Woman to Referee the Big Game
Why the NFL doesn't already have full-time officials and other FAQ - ESPN - NFL Nation- ESPN
2023 Super Bowl: Carl Cheffers to lead officiating crew
Why the NFL is finally hiring full-time officials - ESPN - NFL Nation- ESPN
Extended injury time, no dancing keepers: The Premier League's new rules, Football News
Do College Football Refs Have It In for Your Team? - Bloomberg
The NFL's 'all-star' officiating crews are ruining the playoffs - The Boston Globe
NFL refs should be full-time employees, even if benefits may not be obvious - NBC Sports
How much money do referees make during NFL playoffs? – NBC Sports Bay Area & California