参考文献

Hulme, Christopher; Ncube, Mghele Vellah; Norman, Mark H.; Ognyanov, Vassil I.; Pettus, Liping H.; Wang, Xianghong; Zhu, Jiawang Patent: US2005/165049 A1, 2005 ; Location in patent: Page/Page column 14 ; US 20050165049 A1