| article html file updated | 29 August 2025 22:40 CEST | Update | https://www.mdpi.com/1996-1073/9/2/93 |
| article html file updated | 16 July 2022 01:43 CEST | Update | - |
| article html file updated | 7 February 2020 04:14 CET | Update | - |
| article html file updated | 6 May 2019 01:04 CEST | Update | - |
| article html file updated | 26 March 2019 20:00 CET | Original file | - |
| article pdf uploaded. | 3 February 2016 09:45 CET | Version of Record | https://www.mdpi.com/1996-1073/9/2/93/pdf |
| article xml uploaded. | 3 February 2016 09:45 CET | Original file | https://www.mdpi.com/1996-1073/9/2/93/xml |
