Football helmets are creating more problems than they solve
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
EOS, BASF, Kupol (and 3D Printing) Big Winners of the NFL Helmet Challenge
Development and Multi-Scale Validation of a Finite Element Football Helmet Model
The future of football helmets is driven by innovation and a startup culture - The Athletic
NHL Will Now Use 3D Printed Helmets, Thanks to Carbon and CCM
Aurora bio-med company shares in NFL Helmet Challenge grant
This Football Helmet Crumples—and That's Good
Frontiers Finite element evaluation of an American football helmet featuring liquid shock absorbers for protecting against concussive and subconcussive head impacts
The VICIS ZERO1: Engineering a Safer Football Helmet - GrabCAD Blog
NFL's Safest Helmets Absorb Impact With 3D Printing Instead Of Foam