| article html file updated | 30 August 2025 11:14 CEST | Update | https://www.mdpi.com/2075-4655/3/1/4 |
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| article pdf uploaded. | 28 January 2019 12:05 CET | Updated version of record | https://www.mdpi.com/2075-4655/3/1/4/pdf |
| article xml uploaded. | 28 January 2019 12:05 CET | Update | https://www.mdpi.com/2075-4655/3/1/4/xml |
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| article pdf uploaded. | 18 January 2019 16:59 CET | Updated version of record | https://www.mdpi.com/2075-4655/3/1/4/pdf-vor |
| article pdf uploaded. | 18 January 2019 16:51 CET | Version of Record | https://www.mdpi.com/2075-4655/3/1/4/pdf-vor |
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