| article html file updated | 31 August 2025 17:54 CEST | Update | https://www.mdpi.com/2218-1997/6/4/56 |
| article html file updated | 21 July 2022 02:22 CEST | Update | - |
| article html file updated | 26 April 2020 17:12 CEST | Original file | - |
| article pdf uploaded. | 26 April 2020 17:10 CEST | Updated version of record | https://www.mdpi.com/2218-1997/6/4/56/pdf |
| article xml uploaded. | 26 April 2020 17:10 CEST | Update | https://www.mdpi.com/2218-1997/6/4/56/xml |
| article xml file uploaded | 26 April 2020 17:10 CEST | Update | - |
| article pdf uploaded. | 19 April 2020 08:58 CEST | Version of Record | https://www.mdpi.com/2218-1997/6/4/56/pdf-vor |
| article xml file uploaded | 19 April 2020 08:58 CEST | Original file | - |
