Football helmet with liquid padding may prevent concussions
Laboratory Evaluation of Shell Add-On Products for American Football Helmets for Professional Linemen
Pennsylvania businesses look to grow while helping protect against sports concussions
This Helmet Will Save Football. Actually, Probably Not. - The New York Times
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
New helmet design can deal with sports' twists and turns
New Smart Helmet Could Spot Concussions in Real Time
Helmets protect athletes' skulls. Will the NFL use neuroscience to protect their brains?
Pennsylvania businesses look to grow while helping protect against sports concussions
Football safety concerns come to a head – Orange County Register