参考文献

Niewohner, Ulrich; Niewohner, Maria; Bauser, Marcus; Erguden, Jens-Kerim; Flubacher, Dietmar; Naab, Paul; Repp, Thorsten-Oliver; Stoltefuss, Jurgen; Burkhardt, Nils; Sewing, Andrea; Schauer, Michael; Schlemmer, Karl-Heinz; Weber, Olaf; Boyer, Stephen J.; Miglarese, Mark; Fan, Jianmei; Phillips, Barton; Raudenbush, Brian C.; Wang, Yamin Patent: US2003/236276 A1, 2003 ; Location in patent: Page 15 ; US 20030236276 A1