参考文献

Beavers, Lisa Selsam; Finley, Don Richard; Finn, Terry Patrick; Gadski, Robert Alan; Hipskind, Philip Arthur; Hornback, Wiliam Joseph; Jesudason, Cynthia Darshini; Pickard, Richard Todd; Takakuwa, Takako; Vaught, Grant Mathews Patent: US2010/48580 A1, 2010 ; Location in patent: Page/Page column 14; 15 ; US 20100048580 A1