| article html file updated | 1 September 2025 16:47 CEST | Update | https://www.mdpi.com/2227-9067/8/1/2 |
| article html file updated | 23 July 2022 06:45 CEST | Update | - |
| article html file updated | 24 December 2020 03:39 CET | Update | - |
| article pdf uploaded. | 24 December 2020 03:38 CET | Updated version of record | https://www.mdpi.com/2227-9067/8/1/2/pdf |
| article xml uploaded. | 24 December 2020 03:38 CET | Update | https://www.mdpi.com/2227-9067/8/1/2/xml |
| article xml file uploaded | 24 December 2020 03:38 CET | Update | - |
| article html file updated | 23 December 2020 12:36 CET | Original file | - |
| article pdf uploaded. | 23 December 2020 12:34 CET | Version of Record | https://www.mdpi.com/2227-9067/8/1/2/pdf-vor |
| article xml uploaded. | 23 December 2020 12:34 CET | Update | - |
| article xml file uploaded | 23 December 2020 12:34 CET | Original file | - |
