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| article xml uploaded. | 9 January 2018 13:39 CET | Update | https://www.mdpi.com/2218-2004/6/1/3/xml |
| article pdf uploaded. | 9 January 2018 13:39 CET | Updated version of record | https://www.mdpi.com/2218-2004/6/1/3/pdf |
| article html file updated | 6 January 2018 09:06 CET | Original file | N/A |
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| article pdf uploaded. | 5 January 2018 17:12 CET | Version of Record | https://www.mdpi.com/2218-2004/6/1/3/pdf-vor |
