参考文献

Kuntz, Kevin; Uehling, David Edward; Waterson, Alex Gregory; Emmitte, Kyle Allen; Stevens, Kirk; Shotwell, John Brad; Smith, Stephon Cornell; Nailor, Kristen E.; Salovich, James M.; Wilson, Brian John; Cheung, Mui; Mook, Robert Anthony; Baum, Erich W.; Moorthy, Ganesh Patent: US2008/300242 A1, 2008 ; Location in patent: Page/Page column 102 ; US 20080300242 A1