| article html file updated | 8 June 2020 05:32 CEST | Update | https://www.mdpi.com/2076-0787/9/2/49 |
| article pdf uploaded. | 8 June 2020 05:31 CEST | Updated version of record | https://www.mdpi.com/2076-0787/9/2/49/pdf |
| article xml uploaded. | 8 June 2020 05:31 CEST | Update | https://www.mdpi.com/2076-0787/9/2/49/xml |
| article xml file uploaded | 8 June 2020 05:31 CEST | Update | N/A |
| article html file updated | 4 June 2020 12:31 CEST | Original file | N/A |
| article pdf uploaded. | 4 June 2020 12:30 CEST | Version of Record | https://www.mdpi.com/2076-0787/9/2/49/pdf-vor |
| article xml file uploaded | 4 June 2020 12:30 CEST | Original file | N/A |
