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| article xml uploaded. | 8 October 2017 07:48 CEST | Update | https://www.mdpi.com/2071-1050/9/10/1720/xml |
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| article pdf uploaded. | 8 October 2017 07:48 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/10/1720/pdf |
| article html file updated | 25 September 2017 15:10 CEST | Original file | N/A |
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| article pdf uploaded. | 25 September 2017 15:08 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/10/1720/pdf-vor |
