| article html file updated | 30 August 2025 14:10 CEST | Update | https://www.mdpi.com/1424-2818/11/4/64 |
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| article pdf uploaded. | 19 April 2019 10:12 CEST | Version of Record | https://www.mdpi.com/1424-2818/11/4/64/pdf |
| article xml uploaded. | 19 April 2019 10:12 CEST | Update | https://www.mdpi.com/1424-2818/11/4/64/xml |
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