| article html file updated | 1 September 2025 16:42 CEST | Update | https://www.mdpi.com/1424-8220/21/1/20 |
| article html file updated | 23 July 2022 06:33 CEST | Update | - |
| article html file updated | 24 December 2020 09:00 CET | Original file | - |
| article pdf uploaded. | 24 December 2020 08:58 CET | Updated version of record | https://www.mdpi.com/1424-8220/21/1/20/pdf |
| article xml uploaded. | 24 December 2020 08:58 CET | Update | https://www.mdpi.com/1424-8220/21/1/20/xml |
| article xml file uploaded | 24 December 2020 08:58 CET | Original file | - |
| article pdf uploaded. | 22 December 2020 15:15 CET | Version of Record | https://www.mdpi.com/1424-8220/21/1/20/pdf-vor |
