| article html file updated | 1 September 2025 15:18 CEST | Update | https://www.mdpi.com/2221-3759/8/4/30 |
| article html file updated | 23 July 2022 03:58 CEST | Update | - |
| article html file updated | 8 December 2020 03:53 CET | Update | - |
| article pdf uploaded. | 7 December 2020 07:57 CET | Updated version of record | https://www.mdpi.com/2221-3759/8/4/30/pdf |
| article xml uploaded. | 7 December 2020 07:57 CET | Update | https://www.mdpi.com/2221-3759/8/4/30/xml |
| article xml file uploaded | 7 December 2020 07:57 CET | Update | - |
| article html file updated | 6 December 2020 01:18 CET | Original file | - |
| article pdf uploaded. | 5 December 2020 12:07 CET | Version of Record | https://www.mdpi.com/2221-3759/8/4/30/pdf-vor |
| article xml uploaded. | 5 December 2020 12:07 CET | Update | - |
| article xml file uploaded | 5 December 2020 12:07 CET | Original file | - |
