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| article xml file uploaded | 31 December 2014 03:31 CET | Original file | https://www.mdpi.com/2073-8994/6/4/844/xml |
| article pdf uploaded. | 23 October 2014 11:14 CEST | Updated version of record | https://www.mdpi.com/2073-8994/6/4/844/pdf |
| article pdf uploaded. | 13 October 2014 13:55 CEST | Version of Record | https://www.mdpi.com/2073-8994/6/4/844/pdf-vor |
