参考文献

Sun, Chongqing; Ewing, William R.; Huang, Yanting; Pendri, Annapurna; Gerritz, Samuel; Ellsworth, Bruce A.; Murugesan, Natesan Patent: US2006/160850 A1, 2006 ; Location in patent: Page/Page column 9 ; US 20060160850 A1