| article html file updated | 29 August 2025 22:56 CEST | Update | https://www.mdpi.com/2072-6643/8/4/209 |
| article html file updated | 20 August 2025 22:17 CEST | Update | - |
| article html file updated | 7 February 2020 07:00 CET | Update | - |
| article html file updated | 5 May 2019 19:12 CEST | Update | - |
| article html file updated | 27 March 2019 01:22 CET | Update | - |
| article html file updated | 28 April 2016 09:24 CEST | Update | - |
| article html file updated | 20 April 2016 12:29 CEST | Original file | - |
| article xml uploaded. | 20 April 2016 12:28 CEST | Original file | https://www.mdpi.com/2072-6643/8/4/209/xml |
| article pdf uploaded. | 20 April 2016 12:28 CEST | Version of Record | https://www.mdpi.com/2072-6643/8/4/209/pdf |
