| article html file updated | 30 August 2025 01:45 CEST | Update | https://www.mdpi.com/2224-2708/6/4/27 |
| article html file updated | 16 July 2022 07:30 CEST | Update | N/A |
| article html file updated | 8 February 2020 21:46 CET | Update | N/A |
| article html file updated | 28 September 2019 15:16 CEST | Update | N/A |
| article html file updated | 2 May 2019 13:43 CEST | Update | N/A |
| article html file updated | 18 April 2019 11:22 CEST | Update | N/A |
| article html file updated | 2 January 2018 15:36 CET | Update | N/A |
| article html file updated | 21 November 2017 14:17 CET | Original file | N/A |
| article xml uploaded. | 21 November 2017 14:15 CET | Original file | https://www.mdpi.com/2224-2708/6/4/27/xml |
| article pdf uploaded. | 21 November 2017 14:15 CET | Version of Record | https://www.mdpi.com/2224-2708/6/4/27/pdf |
