参考文献

Nagarathnam, Dhanapalan; Khire, Uday; Asgari, Davoud; Shao, Jianxing; Liu, Xiao-Gao; Wang, Chunguang; Hart, Barry; Weber, Olaf; Lynch, Mark; Zhang, Lei; Wang, Lei Patent: US2004/14755 A1, 2004 ; Location in patent: Page/Page column 21 ; US 20040014755 A1