参考文献

Burger, Matthew; Ding, Yu; Han, Wooseok; Nishiguchi, Gisele; Rico, Alice; Simmons, Robert Lowell; Smith, Aaron R.; Tamez, JR., Victoriano; Tanner, Huw; Wan, Lifeng Patent: US2012/225061 A1, 2012 ; US 20120225061 A1