| article html file updated | 1 September 2025 17:15 CEST | Update | https://www.mdpi.com/1424-8247/14/1/21 |
| article html file updated | 23 July 2022 08:12 CEST | Update | - |
| article html file updated | 31 December 2020 03:24 CET | Original file | - |
| article pdf uploaded. | 31 December 2020 03:23 CET | Updated version of record | https://www.mdpi.com/1424-8247/14/1/21/pdf |
| article xml uploaded. | 31 December 2020 03:23 CET | Update | https://www.mdpi.com/1424-8247/14/1/21/xml |
| article xml file uploaded | 31 December 2020 03:23 CET | Original file | - |
| article pdf uploaded. | 29 December 2020 11:33 CET | Version of Record | https://www.mdpi.com/1424-8247/14/1/21/pdf-vor |
