| article html file updated | 30 August 2025 21:03 CEST | Update | https://www.mdpi.com/2073-4395/9/6/309 |
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| article pdf uploaded. | 17 June 2019 11:34 CEST | Updated version of record | https://www.mdpi.com/2073-4395/9/6/309/pdf |
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| article pdf uploaded. | 12 June 2019 15:39 CEST | Version of Record | https://www.mdpi.com/2073-4395/9/6/309/pdf-vor |
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