| article html file updated | 1 May 2021 12:41 CEST | Original file | https://www.mdpi.com/2072-666X/12/5/509 |
| article pdf uploaded. | 1 May 2021 12:40 CEST | Version of Record | https://www.mdpi.com/2072-666X/12/5/509/pdf |
| article xml uploaded. | 1 May 2021 12:40 CEST | Update | https://www.mdpi.com/2072-666X/12/5/509/xml |
| article xml file uploaded | 1 May 2021 12:40 CEST | Original file | N/A |
