| article html file updated | 29 August 2025 22:40 CEST | Update | https://www.mdpi.com/1996-1073/9/2/97 |
| article html file updated | 16 July 2022 01:44 CEST | Update | N/A |
| article html file updated | 7 February 2020 04:17 CET | Update | N/A |
| article html file updated | 6 May 2019 00:57 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:08 CET | Original file | N/A |
| article xml uploaded. | 19 February 2016 09:45 CET | Update | https://www.mdpi.com/1996-1073/9/2/97/xml |
| article pdf uploaded. | 4 February 2016 16:17 CET | Version of Record | https://www.mdpi.com/1996-1073/9/2/97/pdf |
| article xml uploaded. | 4 February 2016 16:17 CET | Original file | N/A |
