| article html file updated | 30 August 2025 21:22 CEST | Update | https://www.mdpi.com/2226-4787/7/2/70 |
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| article pdf uploaded. | 19 June 2019 12:19 CEST | Version of Record | https://www.mdpi.com/2226-4787/7/2/70/pdf |
| article xml uploaded. | 19 June 2019 12:19 CEST | Update | https://www.mdpi.com/2226-4787/7/2/70/xml |
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