参考文献

Aslanian, Robert G.; Chan, Tin-Yau; Harris, Joel M.; McKittrick, Brian A.; Neustadt, Bernard R.; Palani, Anandan; Priestley, Tony; Smith, Elizabeth M.; Stamford, Andrew; Vaccaro, Henry M.; Xiao, Dong Patent: US2008/76750 A1, 2008 ; Location in patent: Page/Page column 46; 50 ;