| article html file updated | 16 August 2026 20:40 CEST | Update | https://www.mdpi.com/2227-9067/6/12/135 |
| article html file updated | 31 August 2025 06:05 CEST | Update | N/A |
| article html file updated | 21 August 2025 23:32 CEST | Update | N/A |
| article html file updated | 19 July 2022 22:10 CEST | Update | N/A |
| article html file updated | 14 February 2020 17:02 CET | Update | N/A |
| article html file updated | 31 December 2019 00:30 CET | Update | N/A |
| article html file updated | 17 December 2019 03:47 CET | Update | N/A |
| article pdf uploaded. | 17 December 2019 03:46 CET | Updated version of record | https://www.mdpi.com/2227-9067/6/12/135/pdf |
| article xml uploaded. | 17 December 2019 03:46 CET | Update | https://www.mdpi.com/2227-9067/6/12/135/xml |
| article xml file uploaded | 17 December 2019 03:46 CET | Update | N/A |
| article html file updated | 9 December 2019 09:07 CET | Original file | N/A |
| article pdf uploaded. | 9 December 2019 09:06 CET | Version of Record | https://www.mdpi.com/2227-9067/6/12/135/pdf-vor |
| article xml uploaded. | 9 December 2019 09:06 CET | Update | N/A |
| article xml file uploaded | 9 December 2019 09:06 CET | Original file | N/A |
