Kansas City Chiefs: Top 10 games of all-time
Dolphins and Chiefs played longest game in NFL history on Christmas 1971
Seventeen and Oh' Review: A Perfect Season for Dolphins - WSJ
NFL Week 16: What we learned
The Longest Game in NFL History Lasted More Than 7 Hours - FanBuzz
NFL at midseason: How & why Miami Dolphins are Super Bowl contenders
1971–72 NFL playoffs - Wikipedia
Miami Dolphins' Larry Csonka recalls NFL's longest game, on Christmas
Don Banks: Remembering the Christmas gift that was The Longest Game Ever - Sports Illustrated
Hail to the Hapless Kansas City Chiefs - WSJ