| article html file updated | 31 August 2025 06:58 CEST | Update | https://www.mdpi.com/2073-4360/12/1/9 |
| article html file updated | 19 July 2022 21:18 CEST | Update | - |
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| article html file updated | 26 December 2019 08:15 CET | Original file | - |
| article pdf uploaded. | 26 December 2019 08:13 CET | Updated version of record | https://www.mdpi.com/2073-4360/12/1/9/pdf |
| article xml uploaded. | 26 December 2019 08:13 CET | Update | https://www.mdpi.com/2073-4360/12/1/9/xml |
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| article pdf uploaded. | 19 December 2019 12:16 CET | Version of Record | https://www.mdpi.com/2073-4360/12/1/9/pdf-vor |
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