参考文献

Dumas, Jacques; Miller, Scott; Osterhout, Martin; Khire, Uday; Lowinger, Timothy B.; Riedl, Bernd; Scott, William J.; Smith, Roger A.; Wood, Jill E.; Gunn, David; Rodriguez, Martha; Wang, Ming; Turner, Tiffany; Brennan, Catherine Patent: US2008/269265 A1, 2008 ; Location in patent: Page/Page column 18 ; US 20080269265 A1