| article html file updated | 29 August 2025 23:07 CEST | Update | https://www.mdpi.com/2221-3759/4/2/17 |
| article html file updated | 16 July 2022 02:26 CEST | Update | - |
| article html file updated | 7 February 2020 08:58 CET | Update | - |
| article html file updated | 5 May 2019 15:17 CEST | Update | - |
| article html file updated | 27 March 2019 05:12 CET | Update | - |
| article html file updated | 1 July 2016 11:45 CEST | Update | - |
| article html file updated | 19 May 2016 14:43 CEST | Original file | - |
| article xml uploaded. | 19 May 2016 14:41 CEST | Original file | https://www.mdpi.com/2221-3759/4/2/17/xml |
| article pdf uploaded. | 19 May 2016 14:41 CEST | Version of Record | https://www.mdpi.com/2221-3759/4/2/17/pdf |