Football helmet with liquid padding may prevent concussions
New Stanford-Developed High-Tech Helmets Could Protect Football Players From Debilitating Concussions
NFL hopes to reduce head injuries with helmet experiment –
Advancements in Football Helmet Technology - Information, resources and guides on Traumatic Brain Injury
Armor on the Field: The NFL's Headlong Race to Build the Unbreakable Linebacker
Colorado projects aim to reduce, understand concussions
New gear, practice methods: are football concussions decreasing?
Could This Helmet Save Football From The Sport's Concussion Problem?
This Helmet Will Save Football. Actually, Probably Not. - The New York Times
Revolutionary new ZERO1 football helmet may help NFL players reduce concussions