| article html file updated | 31 August 2025 04:18 CEST | Update | https://www.mdpi.com/2308-3425/6/4/40 |
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| article pdf uploaded. | 8 November 2019 10:47 CET | Version of Record | https://www.mdpi.com/2308-3425/6/4/40/pdf |
| article xml uploaded. | 8 November 2019 10:47 CET | Update | https://www.mdpi.com/2308-3425/6/4/40/xml |
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