The Extra Yard: The Ins and Outs of an American Football Helmet - Stories
Op-Ed: 5 steps to protect football players' brains and keep the sport alive - Los Angeles Times
Football's Concussion Crisis Is Awash With Pseudoscience
Helmets don't eliminate concussions. It's time for the NFL to ditch them, NFL
Bennet Omalu, Concussions, and the NFL: How One Doctor Changed Football Forever
Helmet maker Riddell gets creative to solve pandemic-related riddles
NFL players don Guardian Caps, designed to protect from concussion
How Helmets Have Evolved to Prevent Football Concussions - Chester County Hospital
Football Concussions: Prevention, Diagnosis & Recovery
NFL Hopes to Reduce Head Injuries With Helmet Experiment - Bloomberg
Football helmet with liquid padding may prevent concussions