| article html file updated | 30 August 2025 00:07 CEST | Update | https://www.mdpi.com/2073-4360/9/1/4 |
| article html file updated | 16 July 2022 04:17 CEST | Update | - |
| article html file updated | 7 February 2020 20:18 CET | Update | - |
| article html file updated | 22 September 2019 15:11 CEST | Update | - |
| article html file updated | 4 May 2019 17:49 CEST | Update | - |
| article html file updated | 18 March 2019 05:24 CET | Update | - |
| article html file updated | 7 February 2017 10:24 CET | Update | - |
| article html file updated | 26 December 2016 07:32 CET | Original file | - |
| article xml uploaded. | 26 December 2016 07:31 CET | Update | https://www.mdpi.com/2073-4360/9/1/4/xml |
| article xml uploaded. | 26 December 2016 07:31 CET | Original file | - |
| article pdf uploaded. | 26 December 2016 07:31 CET | Version of Record | https://www.mdpi.com/2073-4360/9/1/4/pdf |
