参考文献

CHAUDHARI, Amita; DHANAK, Dashyant; DONATELLI, Carla Ann; FAITG, Thomas H.; FENG, Yanhong; KNIGHT, Steven David; PARRISH, Cynthia A.; RALPH, Jeffrey M. Patent: US2008/293706 A1, 2008 ; Location in patent: Page/Page column 85 ; US 20080293706 A1