| article html file updated | 29 August 2025 22:42 CEST | Update | https://www.mdpi.com/2079-6439/4/1/9 |
| article html file updated | 16 July 2022 01:46 CEST | Update | - |
| article html file updated | 7 February 2020 04:33 CET | Update | - |
| article html file updated | 6 May 2019 00:23 CEST | Update | - |
| article html file updated | 26 March 2019 20:41 CET | Update | - |
| article html file updated | 29 March 2016 07:21 CEST | Original file | - |
| article xml uploaded. | 15 February 2016 11:41 CET | Original file | https://www.mdpi.com/2079-6439/4/1/9/xml |
| article pdf uploaded. | 15 February 2016 11:41 CET | Version of Record | https://www.mdpi.com/2079-6439/4/1/9/pdf |
