Are Modern Football Helmets Any Safer than Old-School Leather Ones?, Science
Impact test comparisons of 20th and 21st century American football helmets in: Journal of Neurosurgery Volume 116 Issue 1 (2012) Journals
Protective helmets make sports safer
NFL to test new position-specific helmet designed for linemen
Detroit-Made Xenith Football Helmets Deemed Safest By The NFL - CBS Detroit
NFL Reveals New Quarterback-Specific Helmet To Help Combat Head Injury - The Sports Credential
Crash-Testing Helmets to Make Super Bowls Safer
Football Helmet Testing, Technology and Safety Research
Football Helmet Testing, Technology and Safety Research
Watch NBC Nightly News With Lester Holt Excerpt: NFL
Football Helmet Testing, Technology and Safety Research
Helmet FE modelling and simulation: (a) Location and direction of
This Startup's 2 Helmets Are Officially the Safest in Football, According to the NFL