| article html file updated | 30 August 2025 06:39 CEST | Update | https://www.mdpi.com/2227-9040/6/3/37 |
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| article pdf uploaded. | 5 September 2018 09:55 CEST | Version of Record | https://www.mdpi.com/2227-9040/6/3/37/pdf |
| article xml uploaded. | 5 September 2018 09:55 CEST | Update | https://www.mdpi.com/2227-9040/6/3/37/xml |
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