| article html file updated | 1 September 2025 11:07 CEST | Update | https://www.mdpi.com/2076-0787/9/4/121 |
| article html file updated | 22 July 2022 21:22 CEST | Update | N/A |
| article html file updated | 19 October 2020 04:12 CEST | Update | N/A |
| article html file updated | 19 October 2020 04:11 CEST | Original file | N/A |
| article pdf uploaded. | 19 October 2020 04:11 CEST | Updated version of record | https://www.mdpi.com/2076-0787/9/4/121/pdf |
| article pdf uploaded. | 19 October 2020 04:10 CEST | Updated version of record | https://www.mdpi.com/2076-0787/9/4/121/pdf-vor |
| article xml uploaded. | 19 October 2020 04:10 CEST | Update | https://www.mdpi.com/2076-0787/9/4/121/xml |
| article xml file uploaded | 19 October 2020 04:10 CEST | Original file | N/A |
| article pdf uploaded. | 16 October 2020 15:33 CEST | Version of Record | https://www.mdpi.com/2076-0787/9/4/121/pdf-vor |
