参考文献

Billedeau, Roland Joseph; Kondru, Rama K.; Lopez-Tapia, Francisco Javier; Lou, Yan; Owens, Timothy D.; Qian, Yimin; So, Sung-Sau; Thakkar, Kshitij C.; Wanner, Jutta Patent: US2012/295885 A1, 2012 ; Location in patent: Page/Page column 32 ;