| article html file updated | 31 August 2025 17:25 CEST | Update | https://www.mdpi.com/2223-7747/9/4/504 |
| article html file updated | 21 July 2022 01:53 CEST | Update | - |
| article html file updated | 9 May 2020 04:33 CEST | Update | - |
| article html file updated | 15 April 2020 09:20 CEST | Original file | - |
| article pdf uploaded. | 15 April 2020 09:18 CEST | Updated version of record | https://www.mdpi.com/2223-7747/9/4/504/pdf |
| article xml uploaded. | 15 April 2020 09:18 CEST | Update | https://www.mdpi.com/2223-7747/9/4/504/xml |
| article xml file uploaded | 15 April 2020 09:18 CEST | Update | - |
| article pdf uploaded. | 14 April 2020 16:53 CEST | Version of Record | https://www.mdpi.com/2223-7747/9/4/504/pdf-vor |
| article xml file uploaded | 14 April 2020 16:53 CEST | Original file | - |
