| article html file updated | 30 June 2021 11:37 CEST | Original file | https://www.mdpi.com/2077-1312/9/7/721 |
| article pdf uploaded. | 30 June 2021 11:36 CEST | Version of Record | https://www.mdpi.com/2077-1312/9/7/721/pdf |
| article xml uploaded. | 30 June 2021 11:36 CEST | Update | https://www.mdpi.com/2077-1312/9/7/721/xml |
| article xml file uploaded | 30 June 2021 11:36 CEST | Original file | N/A |
