Find out how modern football helmets attempt to limit brain injuries
League of Denial: The NFL, Concussions and the Battle for Truth: 9780770437541: Fainaru-Wada, Mark, Fainaru, Steve: Books
New helmet design can deal with sports' twists and turns
Helmet Innovation: More and Better Choices, Fewer Concussions
New Riddell SpeedFlex football helmet pits technology vs. concussions
Are Modern Football Helmets Any Safer than Old-School Leather Ones?, Science
Can a Better Football Helmet Save Your Kid's Brain? - Washingtonian
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Helmets don't eliminate concussions. It's time for the NFL to ditch them, NFL
Football helmets are creating more problems than they solve
California passes laws to limit high school football injury – the Epic
How Effective Are Football Helmets at Preventing Brain Injuries?
With concussions at forefront of minds, helmet designs more important