参考文献

Andjelkovic, Mirjana; Benardeau, Agnes; Chaput, Evelyne; Hebeisen, Paul; Nettekoven, Matthias; Sander, Ulrike Obst; Panousis, Constantinos G.; Roever, Stephan Patent: US2008/85906 A1, 2008 ; Location in patent: Page/Page column 16 ;