| article html file updated | 30 August 2025 07:41 CEST | Update | https://www.mdpi.com/2079-6439/6/4/77 |
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| article pdf uploaded. | 11 October 2018 12:29 CEST | Version of Record | https://www.mdpi.com/2079-6439/6/4/77/pdf |
| article xml uploaded. | 11 October 2018 12:29 CEST | Update | https://www.mdpi.com/2079-6439/6/4/77/xml |
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