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| article xml file uploaded | 7 July 2015 12:52 CEST | Original file | https://www.mdpi.com/2079-4991/5/2/851/xml |
| article pdf uploaded. | 3 June 2015 10:40 CEST | Updated version of record | https://www.mdpi.com/2079-4991/5/2/851/pdf |
| article pdf uploaded. | 26 May 2015 15:13 CEST | Version of Record | https://www.mdpi.com/2079-4991/5/2/851/pdf-vor |