参考文献

Palle, Venkata; Ramdas, Vidya; Barawkar, Dinesh; Basu, Sujay; Koul, Summon; Waman, Yogesh; Patel, Meena; Panmand, Anil Patent: US2012/115864 A1, 2012 ; Location in patent: Page/Page column 29 ;