NFL hopes to reduce head injuries with helmet experiment
Helmet technology being used around Michigan to help detect concussions
Football helmets have improved but are far from 'concussion proof' – Orange County Register
How Helmets Have Evolved to Prevent Football Concussions - Chester County Hospital
Football Concussions: Prevention, Diagnosis & Recovery
See the new football helmet that got funding from the NFL
The Longevity Project: Traumatic brain injury and concussion protocols in youth sports
The NFL concussion protocol cannot save football
Dallas-Fort Worth high school helmets and concussions
NFL players don Guardian Caps, designed to protect from concussion
New Football Helmet Could Save the Sport
Riddell's Newest Helmet – The Concussion Blog
Can Custom-Fit Football Helmets Protect Athletes From Brain Trauma?, Chicago News
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
The Extra Yard: The Ins and Outs of an American Football Helmet - Stories