| article html file updated | 25 December 2025 00:28 CET | Update | https://www.mdpi.com/2218-1997/6/12/239 |
| article html file updated | 1 September 2025 15:54 CEST | Update | N/A |
| article html file updated | 23 July 2022 04:57 CEST | Update | N/A |
| article html file updated | 15 December 2020 06:57 CET | Original file | N/A |
| article pdf uploaded. | 15 December 2020 06:56 CET | Updated version of record | https://www.mdpi.com/2218-1997/6/12/239/pdf |
| article xml uploaded. | 15 December 2020 06:56 CET | Update | https://www.mdpi.com/2218-1997/6/12/239/xml |
| article xml file uploaded | 15 December 2020 06:56 CET | Original file | N/A |
| article pdf uploaded. | 13 December 2020 11:13 CET | Version of Record | https://www.mdpi.com/2218-1997/6/12/239/pdf-vor |
