The Fruitless Search for a 'Concussion-Proof' Football Helmet - The Atlantic
Football helmet design can lower concussion risk, study finds
The Best Concussion-Proof Helmets
Guardian Caps Guardian Sports
New high-tech helmets may protect American football players from debilitating concussions
NFL Concussion Prevention: Could New Helmet Save Football?, News, Scores, Highlights, Stats, and Rumors
Concussions: Revolutionary stride, Local Sports
Editorial: Gift of helmets will help keep high school football players safer, healthier
NFL Helmet Concussion Settlement Finalized: School Football and College Team Helmet Concussion Injuries Still a Serious Danger in 2014