| article html file updated | 12 June 2021 12:09 CEST | Original file | https://www.mdpi.com/2077-1312/9/6/651 |
| article pdf uploaded. | 12 June 2021 12:07 CEST | Version of Record | https://www.mdpi.com/2077-1312/9/6/651/pdf |
| article xml uploaded. | 12 June 2021 12:07 CEST | Update | https://www.mdpi.com/2077-1312/9/6/651/xml |
| article xml file uploaded | 12 June 2021 12:07 CEST | Original file | N/A |
