Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries
8 Major Findings and Headlines from BU CTE Researchers in the Past Year, The Brink
How Effective Are Football Helmets at Preventing Brain Injuries?
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
How to keep your delicate brain safe - BBC Future
The First Plastic Football Helmet Often Broke on Impact - The Atlantic
This Brain Doc Has a “Repulsive” Idea to Make Football Safer
Concussion prevention: Q-collar can reduce brain injury - Sports Illustrated
Football Concussions: Prevention, Diagnosis & Recovery