Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
First quarterback helmet designed to help reduce concussions is approved., RR NEWS USA
Smart football helmet may help detect concussions
Football helmet with liquid padding may prevent concussions
New helmet could offer Dolphins' Tua Tagovailoa concussion protection
New Smart Helmet Could Spot Concussions in Real Time
Giants' Tyrod Taylor sent off field for concussion evaluation
Concussion concerns weigh on parents of football players, Local News
SOURCE SPORTS: NFL Announces New Quarterback Helmet to Reduce Concussion Risk - The Source
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
Parents of late NFL star Demaryius Thomas reveal he suffered CTE Stage 2 - ABC News
Can a Better Football Helmet Save Your Kid's Brain? - Washingtonian
NFL and players union announce new quarterback-specific helmet to combat concussions
NFL, NFLPA release results of annual helmet testing: Three previously approved models now prohibited