| article html file updated | 31 August 2025 07:39 CEST | Update | https://www.mdpi.com/2079-7737/9/1/7 |
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| article pdf uploaded. | 28 December 2019 06:57 CET | Version of Record | https://www.mdpi.com/2079-7737/9/1/7/pdf |
| article xml uploaded. | 28 December 2019 06:57 CET | Update | https://www.mdpi.com/2079-7737/9/1/7/xml |
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