| article html file updated | 1 September 2025 16:41 CEST | Update | https://www.mdpi.com/2218-1997/7/1/2 |
| article html file updated | 23 July 2022 06:30 CEST | Update | N/A |
| article html file updated | 24 December 2020 02:56 CET | Original file | N/A |
| article pdf uploaded. | 24 December 2020 02:55 CET | Updated version of record | https://www.mdpi.com/2218-1997/7/1/2/pdf |
| article xml uploaded. | 24 December 2020 02:55 CET | Update | https://www.mdpi.com/2218-1997/7/1/2/xml |
| article xml file uploaded | 24 December 2020 02:55 CET | Original file | N/A |
| article pdf uploaded. | 22 December 2020 13:20 CET | Version of Record | https://www.mdpi.com/2218-1997/7/1/2/pdf-vor |
