参考文献

Ibrahim, Prabha N.; Bremer, Ryan; Gillette, Sam; Cho, Hanna; Nespi, Marika; Mamo, Shumeye; Zhang, Chao; Artis, Dean R.; Lee, Byunghun; Zuckerman, Rebecca Patent: US2006/100218 A1, 2006 ; Location in patent: Page/Page column 52 ; US 20060100218 A1