| article html file updated | 31 August 2025 08:44 CEST | Update | https://www.mdpi.com/2218-1997/6/1/13 |
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| article pdf uploaded. | 10 January 2020 17:06 CET | Version of Record | https://www.mdpi.com/2218-1997/6/1/13/pdf-vor |
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