NFL rule changes: Modified instant replay, more positions allowed to wear single-digit jerseys - The Washington Post
NFL considers changing rules next year as more teams go for it on fourth down
Replay review in gridiron football - Wikipedia
The Rule Changes We'd Make to Improve the NFL - The Ringer
Ivy League Admits Officiating Error, But Princeton Football Remains Victorious over Harvard, Sports
New NFL rules for 2023: league adopts changes to replay, fourth-downs
Go for It: The Story Behind the NFL's Fourth-Down Conversion - The Ringer
The impossible job: inside the world of Premier League referees, Referees
NFL considers changing rules next year as more teams go for it on fourth down
The replay timing rule change that's not in the rulebook – Football Zebras
Arsenal victims of another VAR error against Brentford - how many points has it cost them this season?, Football News
What stops the clock in the NFL? What are the rules regarding ball out of bounds? - AS USA