| article html file updated | 4 February 2021 12:25 CET | Original file | https://www.mdpi.com/2304-6732/8/2/39 |
| article pdf uploaded. | 4 February 2021 12:23 CET | Version of Record | https://www.mdpi.com/2304-6732/8/2/39/pdf |
| article xml uploaded. | 4 February 2021 12:23 CET | Update | https://www.mdpi.com/2304-6732/8/2/39/xml |
| article xml file uploaded | 4 February 2021 12:23 CET | Original file | - |
