参考文献:
Askew, Benny C. Aya, Toshihiro Biswas, Kaustav Cai, Guolin Chen, Jian J. Han, Nianhe Liu, Qingyian Nguyen, Thomas Nishimura, Nobuko Nomak, Rana Peterkin, Tanya Qian, Wenyuan Yang, Kevin Yuan, Chester Chenguang Zhu, Jiawang D' Amico, Derin C. Human, Jason B. Huang, Qi Patent: US6/54 A, 6 Location in patent: Page/Page column 4 US 654 A