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| article html file updated | 31 August 2025 06:49 CEST | Update | - |
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| article html file updated | 23 December 2019 11:14 CET | Original file | - |
| article pdf uploaded. | 23 December 2019 11:12 CET | Updated version of record | https://www.mdpi.com/2071-1050/12/1/6/pdf |
| article xml uploaded. | 23 December 2019 11:12 CET | Update | https://www.mdpi.com/2071-1050/12/1/6/xml |
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| article pdf uploaded. | 18 December 2019 04:56 CET | Version of Record | https://www.mdpi.com/2071-1050/12/1/6/pdf-vor |
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