| article html file updated | 20 April 2021 10:07 CEST | Update | https://www.mdpi.com/2227-9032/9/4/481 |
| article html file updated | 20 April 2021 04:20 CEST | Original file | - |
| article pdf uploaded. | 20 April 2021 04:18 CEST | Updated version of record | https://www.mdpi.com/2227-9032/9/4/481/pdf |
| article xml uploaded. | 20 April 2021 04:18 CEST | Update | https://www.mdpi.com/2227-9032/9/4/481/xml |
| article xml file uploaded | 20 April 2021 04:18 CEST | Original file | - |
| article pdf uploaded. | 18 April 2021 11:03 CEST | Version of Record | https://www.mdpi.com/2227-9032/9/4/481/pdf-vor |
