参考文献

Blaquiere, Nicole; Do, Steven; Dudley, Danette; Folkes, Adrian; Goldsmith, Richard; Heald, Robert; Heffron, Timothy; Kolesnikov, Aleksandr; Ndubaku, Chudi; Olivero, Alan G.; Price, Stephen; Staben, Steven; Wei, BinQing Patent: US2011/76291 A1, 2011 ; Location in patent: Page/Page column 148 ;