| article html file updated | 24 December 2025 16:52 CET | Update | https://www.mdpi.com/2223-7747/9/1/31 |
| article html file updated | 31 August 2025 07:24 CEST | Update | N/A |
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| article pdf uploaded. | 31 December 2019 09:45 CET | Updated version of record | https://www.mdpi.com/2223-7747/9/1/31/pdf |
| article xml uploaded. | 31 December 2019 09:45 CET | Update | https://www.mdpi.com/2223-7747/9/1/31/xml |
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| article pdf uploaded. | 24 December 2019 13:58 CET | Version of Record | https://www.mdpi.com/2223-7747/9/1/31/pdf-vor |
| article xml file uploaded | 24 December 2019 13:58 CET | Original file | N/A |
