| article html file updated | 9 February 2020 03:17 CET | Update | https://www.mdpi.com/2313-433X/4/1/23 |
| article html file updated | 29 September 2019 23:20 CEST | Update | - |
| article html file updated | 2 May 2019 01:49 CEST | Update | - |
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| article html file updated | 2 February 2018 09:17 CET | Update | - |
| article html file updated | 16 January 2018 16:58 CET | Original file | - |
| article xml uploaded. | 16 January 2018 16:57 CET | Original file | https://www.mdpi.com/2313-433X/4/1/23/xml |
| article pdf uploaded. | 16 January 2018 16:57 CET | Version of Record | https://www.mdpi.com/2313-433X/4/1/23/pdf |
