| article html file updated | 30 August 2025 06:29 CEST | Update | https://www.mdpi.com/2227-7072/6/3/75 |
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| article pdf uploaded. | 30 August 2018 11:07 CEST | Version of Record | https://www.mdpi.com/2227-7072/6/3/75/pdf |
| article xml uploaded. | 30 August 2018 11:07 CEST | Update | https://www.mdpi.com/2227-7072/6/3/75/xml |
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