| article html file updated | 19 August 2026 04:45 CEST | Update | https://www.mdpi.com/2227-9067/8/4/256 |
| article html file updated | 2 September 2025 01:41 CEST | Update | N/A |
| article html file updated | 25 July 2022 09:11 CEST | Update | N/A |
| article html file updated | 3 August 2021 02:44 CEST | Update | N/A |
| article html file updated | 7 April 2021 08:04 CEST | Update | N/A |
| article pdf uploaded. | 7 April 2021 08:03 CEST | Updated version of record | https://www.mdpi.com/2227-9067/8/4/256/pdf |
| article xml uploaded. | 7 April 2021 08:03 CEST | Update | https://www.mdpi.com/2227-9067/8/4/256/xml |
| article xml file uploaded | 7 April 2021 08:03 CEST | Update | N/A |
| article html file updated | 7 April 2021 07:56 CEST | Update | N/A |
| article pdf uploaded. | 7 April 2021 07:55 CEST | Updated version of record | https://www.mdpi.com/2227-9067/8/4/256/pdf-vor |
| article xml file uploaded | 7 April 2021 07:55 CEST | Update | N/A |
| article html file updated | 1 April 2021 16:06 CEST | Update | N/A |
| article pdf uploaded. | 1 April 2021 16:05 CEST | Updated version of record | https://www.mdpi.com/2227-9067/8/4/256/pdf-vor |
| article xml file uploaded | 1 April 2021 16:05 CEST | Update | N/A |
| article html file updated | 26 March 2021 11:31 CET | Update | N/A |
| article pdf uploaded. | 26 March 2021 11:30 CET | Updated version of record | https://www.mdpi.com/2227-9067/8/4/256/pdf-vor |
| article xml file uploaded | 26 March 2021 11:30 CET | Update | N/A |
| article html file updated | 25 March 2021 11:02 CET | Original file | N/A |
| article pdf uploaded. | 25 March 2021 10:18 CET | Version of Record | https://www.mdpi.com/2227-9067/8/4/256/pdf-vor |
| article xml file uploaded | 25 March 2021 10:18 CET | Original file | N/A |
