參考文獻:
Hutchinson, Alan J. Chenard, Bertrand L. Li, Guiying Ghosh, Manuka Tarrant, James G. Yoon, Taeyoung Luke, George P. Lee, Kyungae O'Donnell, Mary-Margaret E. Pringle, Wallace C. Peterson, John M. Hodgetts, Kevin J. Steenstra, Cheryl K. Doller, Dario Patent: US2006/9456 A1, 2006 Location in patent: Page/Page column 49 US 20060009456 A1