参考文献

Ge, Min; He, Jiafang; Lau, Fiona Wai Yu; Liang, Gui-Bai; Lin, Songnian; Liu, Weiguo; Walsh, Shawn P.; Yang, Lihu Patent: US2007/265332 A1, 2007 ; Location in patent: Page/Page column 24 ; US 20070265332 A1