| article html file updated | 9 February 2020 09:39 CET | Update | https://www.mdpi.com/2218-2004/6/1/12 |
| article html file updated | 1 October 2019 13:54 CEST | Update | - |
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| article html file updated | 26 March 2018 15:30 CEST | Update | - |
| article html file updated | 13 March 2018 10:46 CET | Original file | - |
| article xml uploaded. | 13 March 2018 10:45 CET | Original file | https://www.mdpi.com/2218-2004/6/1/12/xml |
| article pdf uploaded. | 13 March 2018 10:45 CET | Version of Record | https://www.mdpi.com/2218-2004/6/1/12/pdf |
