参考文献

ZHANG, Xuqing; ABAD, Marta G.; GIBBS, Alan C.; KUO, Gee-Hong; KUO, Lawrence C.; SONG, Fengbin; SUI, Zhihua Patent: US2011/263559 A1, 2011 ; Location in patent: Page/Page column 30 ; US 20110263559 A1