参考文献

Dales, Natalie; Fonarev, Julia; Fu, Jianmin; Hou, Duanjie; Kamboj, Rajender; Kodumuru, Vishnumurthy; Pokrovskaia, Natalia; Raina, Vandna; Sun, Shaoyi; Zhang, Zaihui Patent: US2009/156615 A1, 2009 ; Location in patent: Page/Page column 19 ; US 20090156615 A1