| article html file updated | 30 August 2025 00:01 CEST | Update | https://www.mdpi.com/2218-1989/6/4/45 |
| article html file updated | 16 July 2022 04:06 CEST | Update | - |
| article html file updated | 7 February 2020 19:23 CET | Update | - |
| article html file updated | 22 September 2019 10:12 CEST | Update | - |
| article html file updated | 4 May 2019 19:43 CEST | Update | - |
| article html file updated | 28 December 2016 10:58 CET | Update | - |
| article html file updated | 9 December 2016 14:03 CET | Original file | - |
| article xml uploaded. | 9 December 2016 14:02 CET | Original file | https://www.mdpi.com/2218-1989/6/4/45/xml |
| article pdf uploaded. | 9 December 2016 14:02 CET | Version of Record | https://www.mdpi.com/2218-1989/6/4/45/pdf |
