| article html file updated | 9 February 2020 18:45 CET | Update | https://www.mdpi.com/2310-2861/4/2/49 |
| article html file updated | 3 October 2019 21:28 CEST | Update | - |
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| article html file updated | 23 May 2018 13:41 CEST | Original file | - |
| article xml uploaded. | 23 May 2018 13:39 CEST | Update | https://www.mdpi.com/2310-2861/4/2/49/xml |
| article pdf uploaded. | 23 May 2018 13:39 CEST | Version of Record | https://www.mdpi.com/2310-2861/4/2/49/pdf |
