When the Whole Country Reviews a Play, Referees Can't Always Join - The New York Times
Updated VAR Protocol: Six situations for review - Total Waterpolo
The Officiating Mess: Worse than Ever, or Just Louder Critics? - Sports Illustrated
Expanded video review proposed in men's lacrosse
NFL Rulebook NFL Football Operations
NFL Rulebook NFL Football Operations
Video Assistant Referee (VAR) protocol
How will instant replay work in Alabama HS football? Answering 20 questions
Sorry, Saints fans: Roger Goodell was never going to overturn result of NFC title game – The Denver Post
NFL instant replay: CFL review rules provide new model - Sports Illustrated
Do NFL referees get fined for bad calls? - Quora
Owners Pass Changes To League's Instant Replay System