| article html file updated | 29 August 2025 22:38 CEST | Update | https://www.mdpi.com/2079-8954/4/1/9 |
| article html file updated | 20 August 2025 22:12 CEST | Update | - |
| article html file updated | 7 February 2020 03:51 CET | Update | - |
| article html file updated | 6 May 2019 01:46 CEST | Update | - |
| article html file updated | 26 March 2019 19:18 CET | Update | - |
| article html file updated | 29 March 2016 11:12 CEST | Original file | - |
| article pdf uploaded. | 26 January 2016 09:23 CET | Version of Record | https://www.mdpi.com/2079-8954/4/1/9/pdf |
| article xml uploaded. | 26 January 2016 09:23 CET | Original file | https://www.mdpi.com/2079-8954/4/1/9/xml |
