参考文献:
Allison, Brett D. Gomez, Laurent Grice, Cheryl A. Hack, Michael D. Morrow, Brian J. Motley, S. Timothy Santillan, Alejandro Shaw, Karen J. Schwarz, Kimberly L. Tang, Liu Y. Venkatesan, Hariharan Wiener, John J. M. Patent: US006/80 A, 006 Location in patent: Page/Page column