| article html file updated | 30 August 2025 14:18 CEST | Update | https://www.mdpi.com/2221-3759/7/2/9 |
| article html file updated | 21 August 2025 20:46 CEST | Update | - |
| article html file updated | 12 February 2020 07:21 CET | Update | - |
| article html file updated | 5 July 2019 16:15 CEST | Update | - |
| article html file updated | 8 May 2019 14:49 CEST | Original file | - |
| article pdf uploaded. | 8 May 2019 12:39 CEST | Updated version of record | https://www.mdpi.com/2221-3759/7/2/9/pdf |
| article xml uploaded. | 8 May 2019 12:39 CEST | Update | https://www.mdpi.com/2221-3759/7/2/9/xml |
| article xml file uploaded | 8 May 2019 12:39 CEST | Update | - |
| article pdf uploaded. | 24 April 2019 07:57 CEST | Version of Record | https://www.mdpi.com/2221-3759/7/2/9/pdf-vor |
| article xml file uploaded | 24 April 2019 07:57 CEST | Original file | - |
