| article html file updated | 30 August 2025 09:05 CEST | Update | https://www.mdpi.com/2313-4321/3/4/52 |
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| article pdf uploaded. | 22 November 2018 08:49 CET | Version of Record | https://www.mdpi.com/2313-4321/3/4/52/pdf |
| article xml uploaded. | 22 November 2018 08:49 CET | Update | https://www.mdpi.com/2313-4321/3/4/52/xml |
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