| article html file updated | 30 August 2025 13:11 CEST | Update | https://www.mdpi.com/2221-3759/7/1/6 |
| article html file updated | 19 July 2022 16:36 CEST | Update | N/A |
| article html file updated | 11 February 2020 23:28 CET | Update | N/A |
| article html file updated | 16 October 2019 21:31 CEST | Update | N/A |
| article html file updated | 26 April 2019 00:35 CEST | Update | N/A |
| article html file updated | 11 April 2019 19:34 CEST | Update | N/A |
| article html file updated | 10 April 2019 16:31 CEST | Update | N/A |
| article html file updated | 4 April 2019 16:35 CEST | Update | N/A |
| article html file updated | 20 March 2019 08:20 CET | Original file | N/A |
| article pdf uploaded. | 20 March 2019 08:19 CET | Version of Record | https://www.mdpi.com/2221-3759/7/1/6/pdf |
| article xml uploaded. | 20 March 2019 08:19 CET | Update | https://www.mdpi.com/2221-3759/7/1/6/xml |
| article xml file uploaded | 20 March 2019 08:19 CET | Original file | N/A |
