Overtime Changes Coming to NFL Playoff Games - Sports Illustrated
With 2011 playoffs, overtime rules change - NBC Sports
What are the NFL Playoff overtime rules? - AS USA
NFL overtime rule: 49ers' Shanahan says it's fair after Bills-Chiefs
How do NFL overtime rules work in the Super Bowl? - The San Diego
NFL approves overtime rule change for postseason
The NFL's new playoff overtime rules, explained
A brief look at the NFL's 16 rule change proposals - Dawgs By Nature
The NFL's stupid overtime rules prevented an all-time great