| article html file updated | 21 June 2021 11:37 CEST | Original file | https://www.mdpi.com/2077-1312/9/6/681 |
| article pdf uploaded. | 21 June 2021 11:35 CEST | Version of Record | https://www.mdpi.com/2077-1312/9/6/681/pdf |
| article xml uploaded. | 21 June 2021 11:35 CEST | Update | https://www.mdpi.com/2077-1312/9/6/681/xml |
| article xml file uploaded | 21 June 2021 11:35 CEST | Original file | N/A |
