This Helmet Will Save Football. Actually, Probably Not. - The New York Times
Can Technology Make Football Safer? - ICWA
NFL Media's Steve Wyche: How NFL's helmet technology has taken off in 2022
Helmet safety: Inside the complicated equipment industry - Sports Illustrated
Engineering a Better Football Helmet, Alumni Association
SAFR Helmet Covers – SAFR Sports
The Football Helmet. Personal Selection, by Brandon Martin
The safest helmet in football: What's inside the NFL's newest headgear
Vicis Ran Out of Cash and Lost Its Founders but Is Still Making Super Bowl-Ready Helmets