Sport Innovation/Technology in NFL helmets/References< Sport Innovation
Beideman, D. (2010). Newer helmets designed to cushion the blow, Philadelphia Inquirer.
Fung, A. (2011). Football Helmet safety hits the hill. National Journal.
Gwin, J., Chu, R., & Greenwald, R. (2006). Head impact telemetry system TM for measurement of head acceleration in ice hockey.
Machine Design. (2011). Helmets go head-to-head in NFL testing. Machine Design,, 83(4), 22-24.
OBrien, B. (2005). Riddell sideline response system identifies head injuries through sensors in football helmet., Oklahoma City.
Riddell. (2012). Riddell Official helmet of the NFL, from http://www.riddell.com/
Vorro, B. (2011). Certified reconditioned helmets help protect football players. Waste and recycling news, 17(9).