参考文献:
Bossenmaier, Birgit Friebe, Walter-Gunar Hoffmann, Eike von Hirschheydt, Thomas Voss, Edgar Patent: US006/6407 A, 006 Location in patent: Page/Page column
参考文献:
Sheppeck, James Dhar, T.G. Murali Doweyko, Lidia Gilmore, John Weinstein, David Xiao, Hai-Yun Yang, Bingwei V. Doweyko, Arthur M. Patent: US006/5497 A, 006 Location in patent: Page/Page column 5