Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
This Brain Doc Has a “Repulsive” Idea to Make Football Safer
This Helmet Will Save Football. Actually, Probably Not. - The New York Times
Riddell launches Axiom, latest helmet to combat concussions
NFL Helmet Manufacturer Warned On Concussion Risk
Concussion prevention: Q-collar can reduce brain injury - Sports Illustrated
Researchers experimenting with device in helmets measuring brain activity to combat concussions - CBS New York
Football Concussions: Prevention, Diagnosis & Recovery
New Rules to Tackle Brain Injuries in Football