N.F.L. Sideline Heaters Can Be Hazardous - The New York Times
Purdy: Extreme cold weather football is survival of the craziest – The Mercury News
Bundle up, because Sunday could offer one of the coldest NFL games ever - FanBuzz
Coldest NFL games in history: Here's a list of the 10 coldest football games ever played
Green Bay Packers' Lambeau Field is coldest stadium in NFL
Mac Jones Has Never Played In a Game as Cold as Saturday in WNY
What is the coldest game in NFL history? Did the Bills vs Patriots break it?
Coldest game of American Football ever to be played?
The Top 5 Coldest Playoff Games in NFL History
Which NFL teams do best in the cold?
The Coldest Vikings Game Ever Played - Mpls.St.Paul Magazine