| article html file updated | 30 August 2025 10:31 CEST | Update | https://www.mdpi.com/2077-0375/9/1/4 |
| article html file updated | 17 July 2022 20:12 CEST | Update | - |
| article html file updated | 11 February 2020 06:13 CET | Update | - |
| article html file updated | 12 October 2019 18:14 CEST | Update | - |
| article html file updated | 27 April 2019 12:30 CEST | Update | - |
| article html file updated | 13 April 2019 08:27 CEST | Update | - |
| article html file updated | 2 April 2019 21:02 CEST | Update | - |
| article html file updated | 26 February 2019 11:33 CET | Update | - |
| article html file updated | 30 January 2019 03:52 CET | Update | - |
| article html file updated | 2 January 2019 03:25 CET | Original file | - |
| article pdf uploaded. | 2 January 2019 03:23 CET | Version of Record | https://www.mdpi.com/2077-0375/9/1/4/pdf |
| article xml uploaded. | 2 January 2019 03:23 CET | Update | https://www.mdpi.com/2077-0375/9/1/4/xml |
| article xml file uploaded | 2 January 2019 03:23 CET | Original file | - |