| article html file updated | 11 February 2020 05:09 CET | Update | https://www.mdpi.com/2571-9408/2/1/4 |
| article html file updated | 12 October 2019 11:06 CEST | Update | N/A |
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| article html file updated | 24 December 2018 14:15 CET | Original file | N/A |
| article xml uploaded. | 24 December 2018 14:14 CET | Update | https://www.mdpi.com/2571-9408/2/1/4/xml |
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| article xml uploaded. | 24 December 2018 14:14 CET | Original file | N/A |
| article pdf uploaded. | 24 December 2018 14:14 CET | Version of Record | https://www.mdpi.com/2571-9408/2/1/4/pdf |
