| article html file updated | 31 August 2025 07:57 CEST | Update | https://www.mdpi.com/2223-7747/9/1/52 |
| article html file updated | 19 July 2022 20:21 CEST | Update | - |
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| article pdf uploaded. | 21 January 2020 08:47 CET | Updated version of record | https://www.mdpi.com/2223-7747/9/1/52/pdf |
| article xml uploaded. | 21 January 2020 08:47 CET | Update | https://www.mdpi.com/2223-7747/9/1/52/xml |
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| article pdf uploaded. | 1 January 2020 09:01 CET | Version of Record | https://www.mdpi.com/2223-7747/9/1/52/pdf-vor |
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