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| article xml file uploaded | 16 June 2014 09:13 CEST | Original file | https://www.mdpi.com/1996-1073/7/4/2146/xml |
| article pdf uploaded. | 1 April 2014 10:23 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/4/2146/pdf |