| article html file updated | 30 August 2025 09:15 CEST | Update | https://www.mdpi.com/2224-2708/7/4/51 |
| article html file updated | 17 July 2022 11:24 CEST | Update | - |
| article html file updated | 10 February 2020 23:33 CET | Update | - |
| article html file updated | 11 October 2019 01:02 CEST | Update | - |
| article html file updated | 28 April 2019 03:05 CEST | Update | - |
| article html file updated | 13 April 2019 23:12 CEST | Update | - |
| article html file updated | 2 April 2019 03:04 CEST | Update | - |
| article html file updated | 25 December 2018 03:59 CET | Update | - |
| article html file updated | 27 November 2018 13:24 CET | Original file | - |
| article pdf uploaded. | 27 November 2018 09:38 CET | Version of Record | https://www.mdpi.com/2224-2708/7/4/51/pdf |
| article xml uploaded. | 27 November 2018 09:38 CET | Update | https://www.mdpi.com/2224-2708/7/4/51/xml |
| article xml file uploaded | 27 November 2018 09:38 CET | Original file | - |