Jeremy Repanich: Helmets alone won't save football from concussions - Sports Illustrated
New helmet design can deal with sports' twists and turns
San Francisco 49ers - Parent Directory - NFL.com
VA Tech Helmet Lab Researchers Conclude 5-Star Football Helmets Are Safer with SAFR Protech Helmet Covers
This Helmet Will Save Football. Actually, Probably Not. - The New York Times
Design and Virtual Testing of American Football Helmets–A Review
This Flexible Football Helmet Absorbs Hits Like a Car Bumper
This Helmet Will Save Football. Actually, Probably Not. - The New York Times
Seattle-based VICIS unveils new design for football helmets
Artefact - Seattle, Washington - Interaction Design, Strategic Consulting, Research
Opinion Want to make football safer? Ban helmets during practice. - The Washington Post