| article html file updated | 31 August 2025 09:50 CEST | Update | https://www.mdpi.com/2227-9067/7/2/9 |
| article html file updated | 20 July 2022 18:22 CEST | Update | - |
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| article html file updated | 29 February 2020 10:23 CET | Original file | - |
| article pdf uploaded. | 29 February 2020 10:22 CET | Updated version of record | https://www.mdpi.com/2227-9067/7/2/9/pdf |
| article xml uploaded. | 29 February 2020 10:22 CET | Update | https://www.mdpi.com/2227-9067/7/2/9/xml |
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| article pdf uploaded. | 23 January 2020 14:55 CET | Version of Record | https://www.mdpi.com/2227-9067/7/2/9/pdf-vor |
| article xml file uploaded | 23 January 2020 14:55 CET | Original file | - |
