| article html file updated | 24 December 2025 18:19 CET | Update | https://www.mdpi.com/2218-1997/6/4/52 |
| article html file updated | 31 August 2025 16:48 CEST | Update | N/A |
| article html file updated | 21 July 2022 01:17 CEST | Update | N/A |
| article html file updated | 20 April 2020 11:55 CEST | Original file | N/A |
| article pdf uploaded. | 20 April 2020 11:48 CEST | Updated version of record | https://www.mdpi.com/2218-1997/6/4/52/pdf |
| article xml uploaded. | 20 April 2020 11:48 CEST | Update | https://www.mdpi.com/2218-1997/6/4/52/xml |
| article xml file uploaded | 20 April 2020 11:48 CEST | Update | N/A |
| article pdf uploaded. | 8 April 2020 13:46 CEST | Version of Record | https://www.mdpi.com/2218-1997/6/4/52/pdf-vor |
| article xml file uploaded | 8 April 2020 13:46 CEST | Original file | N/A |
