| article html file updated | 9 February 2020 05:32 CET | Update | https://www.mdpi.com/2313-433X/4/2/34 |
| article html file updated | 30 September 2019 12:49 CEST | Update | - |
| article html file updated | 1 May 2019 20:55 CEST | Update | - |
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| article html file updated | 28 March 2019 20:57 CET | Update | - |
| article html file updated | 14 March 2018 11:47 CET | Update | - |
| article html file updated | 5 February 2018 11:29 CET | Original file | - |
| article xml uploaded. | 5 February 2018 11:28 CET | Original file | https://www.mdpi.com/2313-433X/4/2/34/xml |
| article pdf uploaded. | 5 February 2018 11:28 CET | Version of Record | https://www.mdpi.com/2313-433X/4/2/34/pdf |
