| article html file updated | 30 August 2025 21:07 CEST | Update | https://www.mdpi.com/2079-3197/7/2/31 |
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| article pdf uploaded. | 14 June 2019 08:09 CEST | Version of Record | https://www.mdpi.com/2079-3197/7/2/31/pdf |
| article xml uploaded. | 14 June 2019 08:09 CEST | Update | https://www.mdpi.com/2079-3197/7/2/31/xml |
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