This Helmet Will Save Football. Actually, Probably Not. - The New York Times
Riddell's Newest Helmet – The Concussion Blog
Guardian Cap used by football teams to protect against head injury – The Denver Post
New Football Helmet Could Save the Sport
New NFL quarterback helmet aims to help combat concussion effects
Football helmet with liquid padding may prevent concussions
Research Tackles Head Injuries In Youth Football
Headpulses Could Help Identify Sports Concussions
Diving Headfirst Into Football Season With A New Look At Concussion Research - Science Friday
NFL Announces New Quarterback-Specific Helmet To Combat Concussion Effects, National Football League, quarterback, helmet
Concussions drop in high school football with new techniques
Riddell launches Axiom, latest helmet to combat concussions