Aaron Rodgers explains why he's now at peace with the Packers - Sports Illustrated
How New Helmet Technology Will Make the NFL and NHL Safer, News, Scores, Highlights, Stats, and Rumors
Helmet Cameras Would Put NFL Fans in the Middle of Everything
Helmet Innovation: More and Better Choices, Fewer Concussions
Helmet Innovation: Continued advancements to keep players safer
Truth About Concussions, High School Football, CTE – Rolling Stone
The safest helmet in football: What's inside the NFL's newest headgear
Bennet Omalu, Concussions, and the NFL: How One Doctor Changed Football Forever
NFL hopes to reduce head injuries with helmet experiment - The San Diego Union-Tribune
This Helmet Will Save Football. Actually, Probably Not. - The New York Times
Guardian Cap Debuts at Training Camps League-wide
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
EXPLAINER: NFL using helmet caps for player safety, research