| article html file updated | 30 August 2025 11:22 CEST | Update | https://www.mdpi.com/1999-4923/11/2/50 |
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| article pdf uploaded. | 26 January 2019 10:47 CET | Updated version of record | https://www.mdpi.com/1999-4923/11/2/50/pdf |
| article xml uploaded. | 26 January 2019 10:47 CET | Update | https://www.mdpi.com/1999-4923/11/2/50/xml |
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| article pdf uploaded. | 22 January 2019 17:17 CET | Updated version of record | https://www.mdpi.com/1999-4923/11/2/50/pdf-vor |
| article pdf uploaded. | 22 January 2019 16:59 CET | Version of Record | https://www.mdpi.com/1999-4923/11/2/50/pdf-vor |
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