参考文献

Lockwood, Samuel F.; Tang, Peng Cho; Nadolski, Geoff; Jackson, Henry L.; Fang, Zhiqiang; Du, Yishu; Yang, Min; Geiss, William; Williams, Richard; Burdick, David; Braun, Cristi L. Patent: US2008/221377 A1, 2008 ; Location in patent: Page/Page column 42; 17 ;