参考文献

Bridger, Gary; Skerlj, Renato; Kaller, Ai; Harwig, Curtis; Bogucki, David; Wilson, Trevor R.; Crawford, Jason; McEachern, Ernest J.; Atsma, Bem; Nan, Siqiao; Zhou, Yuanxi; Schols, Dominique; Smith, Christopher Dennis; Di Fluri, Maria Rosaria Patent: US2003/220341 A1, 2003 ; Location in patent: Page/Page column 9 ; US 20030220341 A1