| article html file updated | 30 August 2025 03:21 CEST | Update | https://www.mdpi.com/2079-8954/6/2/9 |
| article html file updated | 21 August 2025 19:53 CEST | Update | - |
| article html file updated | 16 July 2022 10:31 CEST | Update | - |
| article html file updated | 9 February 2020 12:43 CET | Update | - |
| article html file updated | 1 May 2019 05:41 CEST | Update | - |
| article html file updated | 17 April 2019 05:50 CEST | Update | - |
| article html file updated | 29 March 2019 13:10 CET | Update | - |
| article html file updated | 26 June 2018 04:48 CEST | Update | - |
| article html file updated | 5 April 2018 18:24 CEST | Original file | - |
| article xml uploaded. | 5 April 2018 18:23 CEST | Original file | https://www.mdpi.com/2079-8954/6/2/9/xml |
| article pdf uploaded. | 5 April 2018 18:23 CEST | Version of Record | https://www.mdpi.com/2079-8954/6/2/9/pdf |
