| article html file updated | 31 August 2025 16:19 CEST | Update | https://www.mdpi.com/2227-9067/7/4/28 |
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| article html file updated | 8 October 2020 20:17 CEST | Update | - |
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| article pdf uploaded. | 2 April 2020 17:25 CEST | Version of Record | https://www.mdpi.com/2227-9067/7/4/28/pdf-vor |
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