参考文献

Curtin, Michael L.; Dai, Yujia; Davidsen, Steven K; Frey, Robin R.; Guo, Yan; Heyman, Howard R.; Holms, James H.; Ji, Zhiqin; Michaelides, Michael R.; Vasudevan, Anil; Wada, Carol K. Patent: US2002/177594 A1, 2002 ; US 20020177594 A1