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3. The new all-wheel drive Power train of the Passat 4motion;Gröhlich,2006
4. Daub K, Sauter J, Schmidt I (2000), VDI Bericht, Vergleich der Leistungsfähigkeit laserstrahlgeschweißter und verstemmter Getriebebauteile, pp. 101–115.
5. BMW AG, Landshut, Department TA, 2006, Internal Report.