参考文献

Worley, S.D.; Liang, Jie; Chen, Yongjun; Broughton, Royall M.; Wang, Jia-Wang; Wu, Rong; Cho, Unchin; Lee, Jaewoong; Barnes, Kevin Patent: US2007/15921 A1, 2007 ; Location in patent: Page/Page column 4 ;