参考文献

Ding, Qingjie; Graves, Bradford James; Kong, Norman; Liu, Jin-Jun; Lovey, Allen John; Pizzolato, Giacomo; Roberts, John Lawson; So, Sung-Sau; Vu, Binh Thanh; Wovkulich, Peter Michael Patent: US2007/129416 A1, 2007 ; Location in patent: Page/Page column 30/2 ;