The Fruitless Search for a 'Concussion-Proof' Football Helmet
NFL: Concussion issue a major headache for NFL – The Mercury
NFL retired players still have pending litigation against Riddell
Virginia Tech puts youth football helmets to the test
NFL helmets play central role in helping make football safer
Report warns helmets don't protect young athletes from concussion
ESU teams with Riddell to diagnose potential concussions – The
Football Helmet Misconceptions: Q&A
Former NFL players suing Riddell need to understand their own
Health and Safety Related Changes for the 2018 Season