參考文獻:
Yu, Guixue Ewing, William R. Mikkilineni, Amarendra B. Pendri, Annapurna Sher, Philip M. Gerritz, Samuel Ellsworth, Bruce A. Wu, Gang Huang, Yanting Sun, Chongqing Murugesan, Natesan Gu, Zhengxiang Wang, Ying Sitkoff, Doree Johnson, Stephen R. Wu, Ximao Patent: US2005/143381 A1, 2005 Location in patent: Page/Page column 115