参考文献

Glaser, Gad; Katzhendler, Jehoshua; Hilgenfeld, Rolf; Vidavski, Roee; Wexselblatt, Ezequiel; Prez-Menahemov, Tamar; Kaspy, Ilana Patent: US2011/86813 A1, 2011 ; Location in patent: Page/Page column 33-34 ;