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| article xml file uploaded | 21 July 2014 03:40 CEST | Original file | https://www.mdpi.com/2075-4426/3/1/40/xml |
| article pdf uploaded. | 6 March 2013 15:34 CET | Updated version of record | https://www.mdpi.com/2075-4426/3/1/40/pdf |
| article pdf uploaded. | 5 March 2013 12:01 CET | Version of Record | https://www.mdpi.com/2075-4426/3/1/40/pdf-vor |
