| article html file updated | 30 August 2025 03:36 CEST | Update | https://www.mdpi.com/2313-4321/3/2/15 |
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| article pdf uploaded. | 22 April 2018 09:28 CEST | Version of Record | https://www.mdpi.com/2313-4321/3/2/15/pdf |
| article xml uploaded. | 22 April 2018 09:28 CEST | Update | https://www.mdpi.com/2313-4321/3/2/15/xml |
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