参考文献

Teegarden, Bradley; Xiong, Yifeng; Strah-Pleynet, Sonja; Jayakumar, Honnappa; Dosa, Peter I.; Feichtinger, Konrad; Casper, Martin; Lehmann, Juerg; Jones, Robert M.; Unett, David J.; Karoline Choi, Jin Sun Patent: US2007/207994 A1, 2007 ; Location in patent: Page/Page column 62 ; US 20070207994 A1