The Science of Concussion and Brain Injury - Scientific American
New hard-hat material could reduce concussions by up to 98%
Fiber optic sensor embedded smart helmet for real-time impact sensing and analysis through machine learning - ScienceDirect
Sports Medicine: Pushing Ourselves to the Limit
How long is a cracked motorcycle helmet safe to use? - Quora
Can a Better Football Helmet Save Your Kid's Brain? - Washingtonian
Smart Football Helmet May Help Protect Against Concussions
6 bike helmets of the future