| article html file updated | 2 September 2025 04:04 CEST | Update | https://www.mdpi.com/2218-1997/7/4/104 |
| article html file updated | 25 July 2022 12:32 CEST | Update | N/A |
| article html file updated | 19 April 2021 14:34 CEST | Original file | N/A |
| article pdf uploaded. | 19 April 2021 14:33 CEST | Updated version of record | https://www.mdpi.com/2218-1997/7/4/104/pdf |
| article xml uploaded. | 19 April 2021 14:33 CEST | Update | https://www.mdpi.com/2218-1997/7/4/104/xml |
| article xml file uploaded | 19 April 2021 14:33 CEST | Original file | N/A |
| article pdf uploaded. | 16 April 2021 13:35 CEST | Version of Record | https://www.mdpi.com/2218-1997/7/4/104/pdf-vor |
