NFL overtime rules for playoffs, explained: How is winner determined?
The NFL Rewrites Its Overtime Rules After Playoff Outrage - WSJ
I didn't even know you could tie in the NFL” — The NFL tie shouldn't exist, by Troy Siegler
In NFL postseason overtime, the game should stay the same - Arrowhead Pride
Super Bowl 2021: Here are the overtime rules in case of a tie - Los Angeles Times
American football rules - Wikipedia
The NFL's overtime rules for the playoffs, explained - The Washington Post
NFL overtime rules: How Super Bowl OT works, rule changes and more
Football overtime rules history: Arguments since 1882 - Banner Society
The NFL's Overtime Rules Don't Make Sense - The Ringer
Sunday Night Football on NBC - Reminder, the NFL changed the OT rules and playoff games won't end with a touchdown on the opening drive. 👀 The other team will have a
What happens if the Super Bowl ends in a tie score at the end of the overtime period? - Quora
Super Bowl 51 Ruined by NFL Overtime Rules
New NFL overtime rules, explained: How Bills vs. Chiefs helped change playoff OT format
NFL owners approve rule change for overtime in playoffs