The Women of Pop Are Imagining Life Without Fame - The New York Times
What are Guardian Caps? Shadow Hills football using new device to reduce head injuries
Glossary of association football terms - Wikipedia
Guardian Caps added to help reduce football concussions - The Witmarsum
NFL hopes to reduce head injuries with helmet experiment
What are Guardian Caps and how are they helping football teams?
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
Consequential, a policy podcast from Carnegie Mellon University
NFL hopes to reduce head injuries with helmet experiment
As NFL mandates Guardian caps in practice, area high school football teams have been using them for years, Sports
NFL reports reduction in concussions among players who wore Guardian Caps in preseason - The Athletic