Football helmet with liquid padding may prevent concussions
How Helmets Have Evolved to Prevent Football Concussions - Chester County Hospital
Inadequate Helmet Fit Increases Concussion Severity In High School Football Players – Microsite
UCLA joins program using helmet sensors that monitor head trauma and build data for concussion problem – Orange County Register
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
The Fruitless Search for a 'Concussion-Proof' Football Helmet - The Atlantic
Football Helmets and Concussion: Equaling the Playing Field - Advancing Your Health
UW Study Finds Football Helmet Type, Brand Doesn't Lower Risk Of Concussion
Teen's woodpecker-inspired system aims to reduce football concussions