| article html file updated | 24 December 2020 10:56 CET | Update | https://www.mdpi.com/1718-7729/28/1/2 |
| article xml uploaded. | 24 December 2020 10:54 CET | Update | https://www.mdpi.com/1718-7729/28/1/2/xml |
| article xml file uploaded | 24 December 2020 10:54 CET | Update | - |
| article html file updated | 21 December 2020 06:26 CET | Update | - |
| article pdf uploaded. | 21 December 2020 06:25 CET | Updated version of record | https://www.mdpi.com/1718-7729/28/1/2/pdf |
| article html file updated | 28 November 2020 09:17 CET | Original file | - |
| article pdf uploaded. | 28 November 2020 09:16 CET | Version of Record | https://www.mdpi.com/1718-7729/28/1/2/pdf-vor |
| article xml uploaded. | 28 November 2020 09:16 CET | Update | - |
| article xml file uploaded | 28 November 2020 09:16 CET | Original file | - |
