| article html file updated | 31 August 2025 16:58 CEST | Update | https://www.mdpi.com/2313-433X/6/4/21 |
| article html file updated | 21 July 2022 01:27 CEST | Update | N/A |
| article html file updated | 8 May 2020 16:46 CEST | Update | N/A |
| article html file updated | 13 April 2020 15:06 CEST | Original file | N/A |
| article pdf uploaded. | 13 April 2020 15:04 CEST | Updated version of record | https://www.mdpi.com/2313-433X/6/4/21/pdf |
| article xml uploaded. | 13 April 2020 15:04 CEST | Update | https://www.mdpi.com/2313-433X/6/4/21/xml |
| article xml file uploaded | 13 April 2020 15:04 CEST | Update | N/A |
| article pdf uploaded. | 9 April 2020 17:02 CEST | Version of Record | https://www.mdpi.com/2313-433X/6/4/21/pdf-vor |
| article xml file uploaded | 9 April 2020 17:02 CEST | Original file | N/A |
