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| article xml file uploaded | 18 March 2014 09:30 CET | Original file | https://www.mdpi.com/2079-7737/2/3/872/xml |
| article pdf uploaded. | 1 July 2013 13:50 CEST | Version of Record | https://www.mdpi.com/2079-7737/2/3/872/pdf |
