| article html file updated | 31 August 2025 23:46 CEST | Update | https://www.mdpi.com/2223-7747/9/6/756 |
| article html file updated | 21 July 2022 21:00 CEST | Update | - |
| article html file updated | 6 July 2020 13:01 CEST | Update | - |
| article html file updated | 17 June 2020 11:12 CEST | Original file | - |
| article pdf uploaded. | 17 June 2020 11:11 CEST | Updated version of record | https://www.mdpi.com/2223-7747/9/6/756/pdf |
| article xml uploaded. | 17 June 2020 11:11 CEST | Update | https://www.mdpi.com/2223-7747/9/6/756/xml |
| article xml file uploaded | 17 June 2020 11:10 CEST | Original file | - |
| article pdf uploaded. | 16 June 2020 12:34 CEST | Version of Record | https://www.mdpi.com/2223-7747/9/6/756/pdf-vor |
