| article html file updated | 30 August 2025 01:09 CEST | Update | https://www.mdpi.com/1999-4907/8/9/336 |
| article html file updated | 16 July 2022 06:15 CEST | Update | - |
| article html file updated | 8 February 2020 15:45 CET | Update | - |
| article html file updated | 27 September 2019 01:07 CEST | Update | - |
| article html file updated | 3 May 2019 02:46 CEST | Update | - |
| article html file updated | 30 September 2017 10:23 CEST | Update | - |
| article html file updated | 9 September 2017 11:00 CEST | Original file | - |
| article xml uploaded. | 9 September 2017 10:59 CEST | Original file | https://www.mdpi.com/1999-4907/8/9/336/xml |
| article pdf uploaded. | 9 September 2017 10:59 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/9/336/pdf |