New helmet design can deal with sports' twists and turns
Helmets don't eliminate concussions. It's time for the NFL to ditch them, NFL
NFL players don Guardian Caps, designed to protect from concussion
Football helmets don't protect against concussion — and we're not sure what does
NFL, NFLPA approve concussion-reducing helmet for quarterbacks
Football helmet with liquid padding may prevent concussions
NFL could face thousands of lawsuits from ex-players over brain damage from concussions
New Football Helmet Could Save the Sport
Concussions and CTE in the NFL: The League's Head Problem
A New Helmet For The NFL's Concussion Problem
NFL's stern stance on concussion-preventing helmets, revealed
Concussions and CTE in the NFL: The League's Head Problem
Tackling the brain: Clues emerge about the pathology of sports-related brain trauma
Football safety concerns come to a head – Orange County Register