参考文献

Brown, William; Liu, Ziping; Page, Daniel; Qadoumi, Zena; Srivastava, Sanjay; Tremblay, Maxime; Walpole, Christopher; Wei, Zhong-yong; Yang, Hua Patent: US2011/86853 A1, 2011 ; Location in patent: Page/Page column 28 ; US 20110086853 A1