Falcons to face Saints, 2 other teams while wearing red helmets - The Falcoholic
Despite Risks, N.F.L. Leaves Helmet Choices in Players' Hands - The New York Times
NFL uniform rules and regulations are strict, in a good way - Sports Illustrated
NFL Football Rules and Terms You Should Know About
New Smart Helmet Could Spot Concussions in Real Time
NFL Rules Players Must Follow
Football helmets are creating more problems than they solve
Riddell's Axiom could be breakthrough helmet for football
Why do NFL helmets have 'Choose Love' written on them?
This Helmet Will Save Football. Actually, Probably Not. - The New York Times
Player Health & Safety NFL Football Operations
Explaining Antonio Brown's helmet issue: What are the NFL's rules, Raiders' options, AB's contract?
NFL helmet rule hits on confusion
How NFL's latest safety measures face resistance from players - helmet rule, concussions - ESPN
In name of player safety, NFL starts enforcing rules on illegal hits – The Denver Post