This Helmet Will Save Football. Actually, Probably Not. - The New York Times
Study: Newer Football Helmets Could Slash Concussion Risks
Helmets don't eliminate concussions. It's time for the NFL to ditch them, NFL
How Different Are Dogfighting and Football?
Teen's woodpecker-inspired system aims to reduce football concussions
Football helmets are creating more problems than they solve
What parents need to know about football, concussions and head injuries
The link between head injuries and CTE in football, explained - Vox
Helmet safety: Inside the complicated equipment industry - Sports Illustrated
The Extra Yard: The Ins and Outs of an American Football Helmet - Stories
Recognizing and Treating Concussions Related to Sports Injuries
Can a Better Football Helmet Save Your Kid's Brain? - Washingtonian
American Football Helmet Effectiveness Against a Strain-Based Concussion Mechanism
Guardian Caps Guardian Sports