Impact test comparisons of 20th and 21st century American football helmets in: Journal of Neurosurgery Volume 116 Issue 1 (2012) Journals
Modern football helmets no better than 'leatherheads' at protecting against concussions, study finds | MinnPost
NFL helmet maker helping curb soldiers' head injuries - Sportsnet.ca
NFL-Funded Lab Building a Safer Football Helmet | Diversified Technical Systems
Crash-Testing Helmets to Make Super Bowls Safer - Super Bowl XLVII
What Pros Wear: Top 5 Helmets Rated by the NFL & NFLPA - What Pros Wear
Football Helmet Testing | Technology and Safety Research | NTS
Why NFL Helmets Will Never Be Concussion-Proof
The NFL's Helmet Tests Are Brainless | WIRED
Football Helmet Concussion Testing: Leather vs. Modern - YouTube
New Helmet Technology Aimed to Make Football and Other Sports Safer
Testing football helmets, 1912 - Rare Historical Photos
Football helmet prototype earns second-place prize in NFL's '1st and Future' competition » Liberty News
NFL testing new face shield made by Oakley amid coronavirus pandemic | CBC Sports
More padding the issue of concussions and better helmets
This Startup's 2 Helmets Are Officially the Safest in Football, According to the NFL | Inc.com
Neutral position and impact sites for laboratory linear impactor... | Download Scientific Diagram
Football Helmet Testing | Technology and Safety Research | NTS
Helmet Laboratory Testing Performance Results
NFL, NFLPA Release 2020 Helmet Laboratory Testing Performance Results
Rams' Brian Allen 1st NFL player to reveal positive COVID-19 test - The Mainichi
Vicis high-tech helmets take top 3 spots in NFL's annual performance ranking of equipment - GeekWire
NFL, NFLPA Release 2021 Helmet Laboratory Testing Performance Results
NFL, NFLPA Release 2019 Helmet Lab Testing Results - AFCA Insider
NFL and NFLPA Release 2021 Helmet Testing Performance Results | NFL Football Operations
Football Helmet Testing | Technology and Safety Research | NTS
