参考文献

Cano, Ivan Collado; Dominianni, Samuel James; Etgen, Garret Jay; Garcia-Paredes, Cristina; Johnston, Richard Duane; Letourneau, Michael Edward; Mantlo, Nathan Bryan; Martinelli, Michael John; Mayhugh, Daniel Ray; Saeed, Ashraf; Thompson, Richard Craig; Wang, Xiaodong; Coffey, David Scott; Schmid, Christopher Randall; Vicenzi, Jeffrey Thomas; Xu, Yanping Patent: US2004/102500 A1, 2004 ;