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2. I. Czinege, Comparative analysis of steel and aluminum sheets, Proc. 16th Metal Forming Conf. Miskolc-Hungary, (2017).
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4. Information on http://www.autointell.com/european_companies/volkswagen/audi-ag/audi-cars/audi-a2.
5. Information on https://www.european-aluminium.eu/resource-hub/aluminium-automotive-manual/.