| article html file updated | 1 September 2025 16:43 CEST | Update | https://www.mdpi.com/1999-4907/12/1/4 |
| article html file updated | 23 July 2022 06:34 CEST | Update | - |
| article html file updated | 6 January 2021 10:27 CET | Update | - |
| article pdf uploaded. | 6 January 2021 10:26 CET | Updated version of record | https://www.mdpi.com/1999-4907/12/1/4/pdf |
| article xml uploaded. | 6 January 2021 10:26 CET | Update | https://www.mdpi.com/1999-4907/12/1/4/xml |
| article xml file uploaded | 6 January 2021 10:26 CET | Update | - |
| article html file updated | 24 December 2020 12:43 CET | Update | - |
| article pdf uploaded. | 24 December 2020 12:40 CET | Updated version of record | https://www.mdpi.com/1999-4907/12/1/4/pdf-vor |
| article xml uploaded. | 24 December 2020 12:40 CET | Update | - |
| article xml file uploaded | 24 December 2020 12:40 CET | Update | - |
| article html file updated | 23 December 2020 08:22 CET | Original file | - |
| article pdf uploaded. | 23 December 2020 08:20 CET | Updated version of record | https://www.mdpi.com/1999-4907/12/1/4/pdf-vor |
| article xml uploaded. | 23 December 2020 08:20 CET | Update | - |
| article xml file uploaded | 23 December 2020 08:20 CET | Original file | - |
| article pdf uploaded. | 22 December 2020 16:22 CET | Version of Record | https://www.mdpi.com/1999-4907/12/1/4/pdf-vor |
