| article html file updated | 30 August 2025 02:08 CEST | Update | https://www.mdpi.com/2221-3759/6/1/2 |
| article html file updated | 16 July 2022 08:17 CEST | Update | - |
| article html file updated | 9 February 2020 01:43 CET | Update | - |
| article html file updated | 29 September 2019 14:41 CEST | Update | - |
| article html file updated | 2 May 2019 05:01 CEST | Update | - |
| article html file updated | 18 April 2019 03:05 CEST | Update | - |
| article html file updated | 28 March 2019 12:25 CET | Update | - |
| article html file updated | 27 March 2018 12:40 CEST | Update | - |
| article html file updated | 2 January 2018 20:15 CET | Update | - |
| article xml uploaded. | 2 January 2018 10:32 CET | Update | https://www.mdpi.com/2221-3759/6/1/2/xml |
| article pdf uploaded. | 2 January 2018 10:32 CET | Updated version of record | https://www.mdpi.com/2221-3759/6/1/2/pdf |
| article html file updated | 1 January 2018 11:26 CET | Original file | - |
| article pdf uploaded. | 1 January 2018 11:24 CET | Version of Record | https://www.mdpi.com/2221-3759/6/1/2/pdf-vor |
