| article html file updated | 31 August 2025 11:18 CEST | Update | https://www.mdpi.com/2218-1997/6/2/31 |
| article html file updated | 20 July 2022 19:49 CEST | Update | - |
| article html file updated | 29 February 2020 10:31 CET | Original file | - |
| article pdf uploaded. | 29 February 2020 10:30 CET | Updated version of record | https://www.mdpi.com/2218-1997/6/2/31/pdf |
| article xml uploaded. | 29 February 2020 10:30 CET | Update | https://www.mdpi.com/2218-1997/6/2/31/xml |
| article xml file uploaded | 29 February 2020 10:30 CET | Update | - |
| article pdf uploaded. | 11 February 2020 09:19 CET | Updated version of record | https://www.mdpi.com/2218-1997/6/2/31/pdf-vor |
| article xml file uploaded | 11 February 2020 09:19 CET | Update | - |
| article pdf uploaded. | 11 February 2020 09:19 CET | Version of Record | https://www.mdpi.com/2218-1997/6/2/31/pdf-vor |
| article xml file uploaded | 11 February 2020 09:19 CET | Original file | - |
