参考文献

Berthel, Steven; Firooznia, Fariborz; Fishlock, Daniel; Hong, Jun-Bae; Lou, Yan; Lucas, Matthew; Owens, Timothy D.; Sarma, Keshab; Sweeney, Zachary Kevin; Taygerly, Joshua Paul Gergely Patent: US2010/222325 A1, 2010 ; Location in patent: Page/Page column 79 ; US 20100222325 A1