| article html file updated | 6 September 2025 20:13 CEST | Update | https://www.mdpi.com/2218-1997/7/7/219 |
| article html file updated | 27 July 2022 02:55 CEST | Update | N/A |
| article html file updated | 2 July 2021 04:31 CEST | Original file | N/A |
| article pdf uploaded. | 2 July 2021 04:30 CEST | Updated version of record | https://www.mdpi.com/2218-1997/7/7/219/pdf |
| article xml uploaded. | 2 July 2021 04:30 CEST | Update | https://www.mdpi.com/2218-1997/7/7/219/xml |
| article xml file uploaded | 2 July 2021 04:30 CEST | Original file | N/A |
| article pdf uploaded. | 30 June 2021 16:10 CEST | Version of Record | https://www.mdpi.com/2218-1997/7/7/219/pdf-vor |
