| article html file updated | 31 August 2025 09:45 CEST | Update | https://www.mdpi.com/2218-1997/6/2/20 |
| article html file updated | 21 August 2025 23:37 CEST | Update | N/A |
| article html file updated | 20 July 2022 18:16 CEST | Update | N/A |
| article html file updated | 18 February 2020 11:51 CET | Original file | N/A |
| article pdf uploaded. | 18 February 2020 11:50 CET | Updated version of record | https://www.mdpi.com/2218-1997/6/2/20/pdf |
| article xml uploaded. | 18 February 2020 11:50 CET | Update | https://www.mdpi.com/2218-1997/6/2/20/xml |
| article xml file uploaded | 18 February 2020 11:50 CET | Update | N/A |
| article pdf uploaded. | 22 January 2020 16:03 CET | Version of Record | https://www.mdpi.com/2218-1997/6/2/20/pdf-vor |
| article xml file uploaded | 22 January 2020 16:03 CET | Original file | N/A |
