| article html file updated | 29 August 2025 23:19 CEST | Update | https://www.mdpi.com/2218-1989/6/3/20 |
| article html file updated | 16 July 2022 02:48 CEST | Update | - |
| article html file updated | 7 February 2020 11:23 CET | Update | - |
| article html file updated | 5 May 2019 10:44 CEST | Update | - |
| article html file updated | 27 March 2019 09:41 CET | Update | - |
| article html file updated | 29 September 2016 10:12 CEST | Update | - |
| article html file updated | 8 July 2016 10:26 CEST | Original file | - |
| article xml uploaded. | 8 July 2016 10:25 CEST | Original file | https://www.mdpi.com/2218-1989/6/3/20/xml |
| article pdf uploaded. | 8 July 2016 10:25 CEST | Version of Record | https://www.mdpi.com/2218-1989/6/3/20/pdf |
