| article html file updated | 10 June 2021 16:27 CEST | Update | https://www.mdpi.com/2221-3759/9/2/21 |
| article pdf uploaded. | 10 June 2021 16:26 CEST | Updated version of record | https://www.mdpi.com/2221-3759/9/2/21/pdf |
| article xml uploaded. | 10 June 2021 16:26 CEST | Update | https://www.mdpi.com/2221-3759/9/2/21/xml |
| article xml file uploaded | 10 June 2021 16:26 CEST | Update | N/A |
| article html file updated | 2 June 2021 12:23 CEST | Original file | N/A |
| article pdf uploaded. | 2 June 2021 12:22 CEST | Version of Record | https://www.mdpi.com/2221-3759/9/2/21/pdf-vor |
| article xml file uploaded | 2 June 2021 12:22 CEST | Original file | N/A |
