| article html file updated | 9 February 2020 02:35 CET | Update | https://www.mdpi.com/2411-5134/3/1/4 |
| article html file updated | 29 September 2019 19:27 CEST | Update | - |
| article html file updated | 2 May 2019 03:13 CEST | Update | - |
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| article html file updated | 10 January 2018 14:37 CET | Original file | - |
| article xml uploaded. | 10 January 2018 14:35 CET | Update | https://www.mdpi.com/2411-5134/3/1/4/xml |
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| article pdf uploaded. | 10 January 2018 14:35 CET | Version of Record | https://www.mdpi.com/2411-5134/3/1/4/pdf |
