| article html file updated | 3 August 2021 02:15 CEST | Update | https://www.mdpi.com/2227-9709/8/2/21 |
| article html file updated | 25 March 2021 07:19 CET | Original file | N/A |
| article pdf uploaded. | 25 March 2021 07:17 CET | Version of Record | https://www.mdpi.com/2227-9709/8/2/21/pdf |
| article xml uploaded. | 25 March 2021 07:17 CET | Update | https://www.mdpi.com/2227-9709/8/2/21/xml |
| article xml file uploaded | 25 March 2021 07:17 CET | Original file | N/A |
