| article html file updated | 9 February 2020 02:54 CET | Update | https://www.mdpi.com/2413-8851/2/1/5 |
| article html file updated | 29 September 2019 21:09 CEST | Update | - |
| article html file updated | 2 May 2019 02:33 CEST | Update | - |
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| article html file updated | 28 March 2019 15:13 CET | Update | - |
| article html file updated | 12 January 2018 18:14 CET | Original file | - |
| article xml uploaded. | 12 January 2018 18:13 CET | Original file | https://www.mdpi.com/2413-8851/2/1/5/xml |
| article pdf uploaded. | 12 January 2018 18:13 CET | Version of Record | https://www.mdpi.com/2413-8851/2/1/5/pdf |
