NFL overtime rules for playoffs, explained: How is winner determined?
The NFL quiz with 10,000 questions – Quirky Research
NFL Playoffs: Overtime rules for the NFL's 2016 postseason games - Baltimore Beatdown
Contradictory rules under consideration could turn 10-minute overtime into a 5-minute egg – Football Zebras
IT'S OPEN SEASON ON THE ZEBRAS - Sports Illustrated Vault
Overtime rules for the NFL playoffs – Football Zebras
NFL overtime rules: A timeline of every failed NFL team proposal to change OT format since 2010
The Winners and Losers From the NFL's Conference Championship Games - The Ringer
NFL owners approve new overtime rules for playoffs, ensuring each team gets a possession