| article html file updated | 31 August 2025 10:16 CEST | Update | https://www.mdpi.com/2227-7099/8/1/9 |
| article html file updated | 20 July 2022 18:47 CEST | Update | - |
| article html file updated | 1 April 2020 22:07 CEST | Update | - |
| article html file updated | 26 March 2020 12:36 CET | Original file | - |
| article pdf uploaded. | 26 March 2020 12:35 CET | Updated version of record | https://www.mdpi.com/2227-7099/8/1/9/pdf |
| article xml uploaded. | 26 March 2020 12:35 CET | Update | https://www.mdpi.com/2227-7099/8/1/9/xml |
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| article pdf uploaded. | 30 January 2020 11:19 CET | Version of Record | https://www.mdpi.com/2227-7099/8/1/9/pdf-vor |
| article xml file uploaded | 30 January 2020 11:19 CET | Original file | - |
