NFL, NFLPA approve new helmets for quarterbacks in latest step to combat concussions
NFL Helmet Manufacturer Warned On Concussion Risk
FOOTBALL SAFETY FOR DUMMIES: Innovations to Reduce Effects of Concussi – 2nd Skull, Inc.
Digital Design, QBs Improving Football Helmet Safety
Finite Element Models: New Tools for Innovation in Football Helmet Design
Helmet Innovation: More and Better Choices, Fewer Concussions
Chargers News: NFL, NFLPA approves first-ever position-specific helmets - Bolts From The Blue
Built By Data: NFL Helmet Innovation
The Extra Yard: The Ins and Outs of an American Football Helmet - Stories
Riddell Axiom football helmet
The Football Helmet from Vicis Enhanced with 3D Printing - 3Dnatives
Built By Data: NFL Helmet Innovation
What is with these funky helmet decals? - Dawgs By Nature