The Safest Football Helmet Is Not Yet a Hit in the NFL - WSJ
Vicis pulls concussion-resistant helmets from UW camp - Sports Illustrated
VICIS Zero2 TRENCH Black - US Sports Gear
NFL helmet safety rankings: Seattle startup Vicis tops list again with high-tech head protector – GeekWire
Football helmets have improved but are far from 'concussion proof' – San Bernardino Sun
The N.F.L.'s Favorite Helmet Maker Is in Financial Trouble - The New York Times
Vicis football helmet unboxing: Watch a high school linebacker open his new high-tech head protector – GeekWire
VICIS, which makes 'safest' helmet used by NFL players, is almost out of money
Heads up! New helmet getting tryout at NFL minicamps
NFL to prohibit use of certain helmets for 1st time
VICIS Zero1 top testing helmet NFL
Should Michigan High School Football Teams Convert To State-Of-The-Art Helmet? - CBS Detroit