| article html file updated | 31 August 2025 12:37 CEST | Update | https://www.mdpi.com/2075-1702/8/1/9 |
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| article pdf uploaded. | 25 March 2020 15:47 CET | Updated version of record | https://www.mdpi.com/2075-1702/8/1/9/pdf |
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| article pdf uploaded. | 24 February 2020 16:57 CET | Version of Record | https://www.mdpi.com/2075-1702/8/1/9/pdf-vor |
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