参考文献

Sun, Chong-Qing; Hamann, Lawrence; Augeri, David; Bi, Yingzhi; Robl, Jeffrey; Huang, Yan-Ting; Wang, Tammy; Holubec, Alexandra; Simpkins, Ligaya; Sutton, James C.; Li, James J. Patent: US2004/181064 A1, 2004 ; US 20040181064 A1