| article html file updated | 18 February 2021 14:15 CET | Original file | https://www.mdpi.com/2673-4117/2/1/4 |
| article pdf uploaded. | 18 February 2021 14:13 CET | Version of Record | https://www.mdpi.com/2673-4117/2/1/4/pdf |
| article xml uploaded. | 18 February 2021 14:13 CET | Update | https://www.mdpi.com/2673-4117/2/1/4/xml |
| article xml file uploaded | 18 February 2021 14:13 CET | Original file | N/A |
