| article html file updated | 30 August 2025 07:46 CEST | Update | https://www.mdpi.com/2079-9268/8/4/38 |
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| article pdf uploaded. | 13 October 2018 12:32 CEST | Version of Record | https://www.mdpi.com/2079-9268/8/4/38/pdf |
| article xml uploaded. | 13 October 2018 12:32 CEST | Update | https://www.mdpi.com/2079-9268/8/4/38/xml |
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