Football helmet with liquid padding may prevent concussions
New tools in fight against concussions – The Denver Post
Football Helmets and Concussion: Equaling the Playing Field - Advancing Your Health
How Irish are taking more safety measures when it comes to concussions
Head Injuries & American Football - Ethics Unwrapped
Guardian Caps Guardian Sports
Athletic Trainer Mythbusters Myth #1: Concussion Prevention - The Center for Physical Rehabilitation
CFL introduces mandatory extra helmet protection for multiple positions. As well as other new health & safety measures. : r/sports
Concussions are a huge issue in football. Outer-padded helmets could go a long way toward solving it. - ESPN
Helmet Smart Foam Signals Potential Concussions in Real Time - Medical Design Briefs
Football Concussions Occur Mostly in Practice, Not Games