| article html file updated | 29 August 2025 22:53 CEST | Update | https://www.mdpi.com/2221-3759/4/2/13 |
| article html file updated | 20 August 2025 22:16 CEST | Update | - |
| article html file updated | 7 February 2020 06:24 CET | Update | - |
| article html file updated | 5 May 2019 20:26 CEST | Update | - |
| article html file updated | 27 March 2019 00:19 CET | Update | - |
| article html file updated | 1 July 2016 11:44 CEST | Update | - |
| article html file updated | 25 March 2016 08:18 CET | Original file | - |
| article xml uploaded. | 25 March 2016 08:17 CET | Original file | https://www.mdpi.com/2221-3759/4/2/13/xml |
| article pdf uploaded. | 25 March 2016 08:17 CET | Version of Record | https://www.mdpi.com/2221-3759/4/2/13/pdf |
