参考文献

Thede, Kai; Flamme, Ingo; Oehme, Felix; Ergüden, Jens-Kerim; Stoll, Friederike; Schuhmacher, Joachim; Wild, Hanno; Kolkhof, Peter; Beck, Hartmut; Akbaba, Metin; Jeske, Mario Patent: US2012/264704 A1, 2012 ; Location in patent: Page/Page column 17 ;