参考文献

Ye, Xiaocong Michael; Garofalo, Albert W.; Lawler, Rose D.; Fukuda, Juri Y.; Konradi, Andrei W.; Holcomb, Ryan; Rossiter, Kassandra I.; Wone, David W.G.; Wu, Jing Patent: US2007/32475 A1, 2007 ; Location in patent: Page/Page column 42 ; US 20070032475 A1