参考文献:
Basha, Anwer Bunnelle, William H. Dart, Michael J. Gallagher, Megan E. Ji, Jianguo Li, Tao Pace, Jennifer M. Ryther, Keith B. Tietje, Karin R. Mortell, Kathleen H. Nersesian, Diana L. Schrimpf, Michael R. Patent: US005/060 A, 005 Location in patent: Page/Page column 5