Helmet hits causing more than just concussions - The Boston Globe
The dangers of concussions in high school sports
Report: More than 100 diagnosed concussions left out of NFL studies, including injuries to ex-Cowboys QB Troy Aikman
Truth About Concussions, High School Football, CTE – Rolling Stone
The link between head injuries and CTE in football, explained - Vox
College programs take proactive approach to helmet safety, All OU Sports
NFL players wear Guardian Caps to reduce head trauma during training camp
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
Virginia Tech lab releases first safety ratings for youth football helmets
AT&T and Gallaudet University unveil a football helmet for deaf and hard of hearing quarterbacks –
Ex-NFL players six times more likely than the general public to report cognitive problems, study finds - The Boston Globe