| article html file updated | 9 February 2020 02:51 CET | Update | https://www.mdpi.com/2504-4494/2/1/4 |
| article html file updated | 29 September 2019 20:50 CEST | Update | - |
| article html file updated | 2 May 2019 02:40 CEST | Update | - |
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| article html file updated | 28 March 2019 15:05 CET | Update | - |
| article html file updated | 12 January 2018 15:19 CET | Original file | - |
| article xml uploaded. | 12 January 2018 15:18 CET | Update | https://www.mdpi.com/2504-4494/2/1/4/xml |
| article xml uploaded. | 12 January 2018 15:18 CET | Original file | - |
| article pdf uploaded. | 12 January 2018 15:18 CET | Version of Record | https://www.mdpi.com/2504-4494/2/1/4/pdf |
