參考文獻:
Madar, David J. Djuric, Stevan W. Michmerhuizen, Melissa J. Kopecka, Hana A. Li, Xiaofeng Longenecker, Kenton L. Pei, Zhonghua Pireh, Daisy Sham, Hing L. Stewart, Kent D. Szczepankiewicz, Bruce G. Wiedeman, Paul E. Yong, Hong Patent: US2004/259843 A1, 2004