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| article xml file uploaded | 7 January 2014 12:35 CET | Original file | https://www.mdpi.com/1999-4915/5/11/2721/xml |
| article pdf uploaded. | 15 November 2013 17:53 CET | Updated version of record | https://www.mdpi.com/1999-4915/5/11/2721/pdf |
| article pdf uploaded. | 12 November 2013 13:16 CET | Version of Record | https://www.mdpi.com/1999-4915/5/11/2721/pdf-vor |
