| article html file updated | 23 October 2025 06:37 CEST | Update | https://www.mdpi.com/2076-2615/9/2/50 |
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| article pdf uploaded. | 18 February 2019 11:54 CET | Updated version of record | https://www.mdpi.com/2076-2615/9/2/50/pdf |
| article xml uploaded. | 18 February 2019 11:54 CET | Update | https://www.mdpi.com/2076-2615/9/2/50/xml |
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| article pdf uploaded. | 7 February 2019 11:56 CET | Version of Record | https://www.mdpi.com/2076-2615/9/2/50/pdf-vor |
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