| article html file updated | 22 February 2021 12:03 CET | Original file | https://www.mdpi.com/2673-3161/2/1/4 |
| article pdf uploaded. | 22 February 2021 12:02 CET | Version of Record | https://www.mdpi.com/2673-3161/2/1/4/pdf |
| article xml uploaded. | 22 February 2021 12:02 CET | Update | https://www.mdpi.com/2673-3161/2/1/4/xml |
| article xml file uploaded | 22 February 2021 12:02 CET | Original file | N/A |
