| article html file updated | 30 August 2025 03:41 CEST | Update | https://www.mdpi.com/2073-4336/9/2/21 |
| article html file updated | 21 August 2025 20:03 CEST | Update | - |
| article html file updated | 16 July 2022 11:03 CEST | Update | - |
| article html file updated | 9 February 2020 15:31 CET | Update | - |
| article html file updated | 3 October 2019 00:53 CEST | Update | - |
| article html file updated | 1 May 2019 00:10 CEST | Update | - |
| article html file updated | 17 April 2019 00:50 CEST | Update | - |
| article html file updated | 29 March 2019 19:43 CET | Update | - |
| article html file updated | 27 April 2018 08:03 CEST | Original file | - |
| article pdf uploaded. | 27 April 2018 08:02 CEST | Updated version of record | https://www.mdpi.com/2073-4336/9/2/21/pdf |
| article xml uploaded. | 27 April 2018 08:02 CEST | Update | https://www.mdpi.com/2073-4336/9/2/21/xml |
| article xml file uploaded | 27 April 2018 08:02 CEST | Update | - |
| article pdf uploaded. | 26 April 2018 17:39 CEST | Updated version of record | - |
| article xml file uploaded | 26 April 2018 17:38 CEST | Original file | - |
