参考文献

Anderson, David John; Beauchamp, Thomas J.; Bundy, Gordon L.; Ciske, Fred L.; Farrell, John R.; Graber, David R.; Genin, Michael J.; Judge, Thomas M.; Moon, Malcolm Wilson; Schnute, Mark E.; Strohbach, Joseph Walter; Thaisrivongs, Suvit; Thorarensen, Atli; Turner, Steven Robert; Vaillancourt, Valerie A.; Wolf, Allison J. Patent: US2002/25959 A1, 2002 ;